<?xml version="1.0" encoding="US-ASCII"?>
<!-- DFIN New ActiveDisclosure (SM) XBRL Schema Document - http://www.dfinsolutions.com/ -->
<!-- Creation Date :2026-03-12T16:55:36.5851+00:00 -->
<!-- Copyright (c) 2026 Donnelley Financial Solutions, Inc. All Rights Reserved. -->
<xsd:schema targetNamespace="http://www.baincapital.com/20251231" attributeFormDefault="unqualified" elementFormDefault="qualified" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2024-01-31" xmlns:country="http://xbrl.sec.gov/country/2025" xmlns:ecd-sub="http://xbrl.sec.gov/ecd-sub/2025" xmlns:cef="http://xbrl.sec.gov/cef/2025" xmlns:ecd="http://xbrl.sec.gov/ecd/2025" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:dei="http://xbrl.sec.gov/dei/2025" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:cef-pre="http://xbrl.sec.gov/cef-pre/2025" xmlns:cyd="http://xbrl.sec.gov/cyd/2025" xmlns:us-types="http://fasb.org/us-types/2025" xmlns:enum2="http://xbrl.org/2020/extensible-enumerations-2.0" xmlns:srt="http://fasb.org/srt/2025" xmlns:us-gaap="http://fasb.org/us-gaap/2025" xmlns:ck0001899017="http://www.baincapital.com/20251231" xmlns:xlink="http://www.w3.org/1999/xlink">
  <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/instance"/>
  <xsd:import schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd" namespace="http://www.xbrl.org/2003/linkbase"/>
  <xsd:import schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd" namespace="http://xbrl.org/2005/xbrldt"/>
  <xsd:import schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd" namespace="http://fasb.org/us-gaap/2025"/>
  <xsd:import schemaLocation="https://www.xbrl.org/dtr/type/2024-01-31/types.xsd" namespace="http://www.xbrl.org/dtr/type/2024-01-31"/>
  <xsd:import schemaLocation="https://xbrl.sec.gov/country/2025/country-2025.xsd" namespace="http://xbrl.sec.gov/country/2025"/>
  <xsd:import schemaLocation="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd" namespace="http://fasb.org/srt/2025"/>
  <xsd:import schemaLocation="https://xbrl.sec.gov/ecd/2025/ecd-sub-2025.xsd" namespace="http://xbrl.sec.gov/ecd-sub/2025"/>
  <xsd:import schemaLocation="https://xbrl.sec.gov/dei/2025/dei-2025.xsd" namespace="http://xbrl.sec.gov/dei/2025"/>
  <xsd:import schemaLocation="https://xbrl.sec.gov/ecd/2025/ecd-2025.xsd" namespace="http://xbrl.sec.gov/ecd/2025"/>
  <xsd:import schemaLocation="https://www.xbrl.org/2020/extensible-enumerations-2.0.xsd" namespace="http://xbrl.org/2020/extensible-enumerations-2.0"/>
  <xsd:import schemaLocation="https://xbrl.sec.gov/cef/2025/cef-2025_pre.xsd" namespace="http://xbrl.sec.gov/cef-pre/2025"/>
  <xsd:import schemaLocation="https://xbrl.fasb.org/us-gaap/2025/elts/us-types-2025.xsd" namespace="http://fasb.org/us-types/2025"/>
  <xsd:import schemaLocation="https://xbrl.sec.gov/cef/2025/cef-2025.xsd" namespace="http://xbrl.sec.gov/cef/2025"/>
  <xsd:import schemaLocation="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd" namespace="http://xbrl.sec.gov/cyd/2025"/>
  <xsd:import schemaLocation="https://www.xbrl.org/2023/calculation-1.1.xsd" namespace="https://xbrl.org/2023/calculation-1.1"/>
  <xsd:annotation>
    <xsd:appinfo>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DocumentDocumentAndEntityInformation" id="DocumentDocumentAndEntityInformation">
        <link:definition>75000 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfAssetsAndLiabilities1" id="StatementConsolidatedStatementsOfAssetsAndLiabilities1">
        <link:definition>75010 - Statement - Consolidated Statements of Assets and Liabilities</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfAssetsAndLiabilitiesParenthetical" id="StatementConsolidatedStatementsOfAssetsAndLiabilitiesParenthetical">
        <link:definition>75020 - Statement - Consolidated Statements of Assets and Liabilities (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfOperations" id="StatementConsolidatedStatementsOfOperations">
        <link:definition>75030 - Statement - Consolidated Statements of Operations</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfChangesInNetAssets" id="StatementConsolidatedStatementsOfChangesInNetAssets">
        <link:definition>75040 - Statement - Consolidated Statements of Changes in Net Assets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" id="StatementConsolidatedStatementsOfCashFlows">
        <link:definition>75050 - Statement - Consolidated Statements of Cash Flows</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestments" id="StatementConsolidatedScheduleOfInvestments">
        <link:definition>75060 - Statement - Consolidated Schedule of Investments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsDefault" id="StatementConsolidatedScheduleOfInvestmentsDefault">
        <link:definition>75060 - Statement - Consolidated Schedule of Investments [Default]</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsInterestRateSwap" id="StatementConsolidatedScheduleOfInvestmentsInterestRateSwap">
        <link:definition>75070 - Statement - Consolidated Schedule of Investments - Interest Rate Swap</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsInterestRateSwapDefault" id="StatementConsolidatedScheduleOfInvestmentsInterestRateSwapDefault">
        <link:definition>75070 - Statement - Consolidated Schedule of Investments - Interest Rate Swap [Default]</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsForwardForeignCurrencyExchangeContracts" id="StatementConsolidatedScheduleOfInvestmentsForwardForeignCurrencyExchangeContracts">
        <link:definition>75080 - Statement - Consolidated Schedule of Investments - Forward Foreign Currency Exchange Contracts</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsForwardForeignCurrencyExchangeContractsParenthetical" id="StatementConsolidatedScheduleOfInvestmentsForwardForeignCurrencyExchangeContractsParenthetical">
        <link:definition>75090 - Statement - Consolidated Schedule of Investments - Forward Foreign Currency Exchange Contracts (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCybersecurityRiskManagementStrategyAndGovernance" id="DisclosureCybersecurityRiskManagementStrategyAndGovernance">
        <link:definition>995480 - Disclosure - Cybersecurity Risk Management, Strategy and Governance</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureOrganization" id="DisclosureOrganization">
        <link:definition>995490 - Disclosure - Organization</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies1" id="DisclosureSummaryOfSignificantAccountingPolicies1">
        <link:definition>995500 - Disclosure - Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestments" id="DisclosureInvestments">
        <link:definition>995510 - Disclosure - Investments</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurements" id="DisclosureFairValueMeasurements">
        <link:definition>995520 - Disclosure - Fair Value Measurements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreement" id="DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreement">
        <link:definition>995530 - Disclosure - Agreements and Related Party Transactions Investment Advisory Agreement</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebt" id="DisclosureDebt">
        <link:definition>995540 - Disclosure - Debt</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivatives" id="DisclosureDerivatives">
        <link:definition>995550 - Disclosure - Derivatives</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssets" id="DisclosureNetAssets">
        <link:definition>995560 - Disclosure - Net Assets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTax" id="DisclosureIncomeTax">
        <link:definition>995570 - Disclosure - Income Tax</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCommitmentsAndContingencies" id="DisclosureCommitmentsAndContingencies">
        <link:definition>995580 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFinancialHighlights" id="DisclosureFinancialHighlights">
        <link:definition>995590 - Disclosure - Financial Highlights</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnaudited" id="DisclosureSelectedQuarterlyFinancialDataUnaudited">
        <link:definition>995600 - Disclosure - Selected Quarterly Financial Data (unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureWarehousingTransaction" id="DisclosureWarehousingTransaction">
        <link:definition>995610 - Disclosure - Warehousing Transaction</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSubsequentEvents" id="DisclosureSubsequentEvents">
        <link:definition>995620 - Disclosure - Subsequent Events</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" id="DisclosureSummaryOfSignificantAccountingPoliciesPolicies">
        <link:definition>995630 - Disclosure - Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsTables" id="DisclosureInvestmentsTables">
        <link:definition>995640 - Disclosure - Investments (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsTables" id="DisclosureFairValueMeasurementsTables">
        <link:definition>995650 - Disclosure - Fair Value Measurements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementTables" id="DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementTables">
        <link:definition>995660 - Disclosure - Agreements and Related Party Transactions Investment Advisory Agreement (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtTables" id="DisclosureDebtTables">
        <link:definition>995670 - Disclosure - Debt (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesTables" id="DisclosureDerivativesTables">
        <link:definition>995680 - Disclosure - Derivatives (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsTables" id="DisclosureNetAssetsTables">
        <link:definition>995690 - Disclosure - Net Assets (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxTables" id="DisclosureIncomeTaxTables">
        <link:definition>995700 - Disclosure - Income Tax (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCommitmentsAndContingenciesTables" id="DisclosureCommitmentsAndContingenciesTables">
        <link:definition>995710 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFinancialHighlightsTables" id="DisclosureFinancialHighlightsTables">
        <link:definition>995720 - Disclosure - Financial Highlights (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnauditedTables" id="DisclosureSelectedQuarterlyFinancialDataUnauditedTables">
        <link:definition>995730 - Disclosure - Selected Quarterly Financial Data (unaudited) (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureOrganizationDetails" id="DisclosureOrganizationDetails">
        <link:definition>995740 - Disclosure - Organization (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails" id="DisclosureSummaryOfSignificantAccountingPoliciesDetails">
        <link:definition>995750 - Disclosure - Summary of Significant Accounting Policies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsInvestmentByTypeDetails" id="DisclosureInvestmentsInvestmentByTypeDetails">
        <link:definition>995760 - Disclosure - Investments - Investment By Type (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsDetails" id="DisclosureInvestmentsDetails">
        <link:definition>995770 - Disclosure - Investments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsInvestmentByGeographicRegionDetails" id="DisclosureInvestmentsInvestmentByGeographicRegionDetails">
        <link:definition>995780 - Disclosure - Investments - Investment By Geographic Region (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsInvestmentByIndustryDetails" id="DisclosureInvestmentsInvestmentByIndustryDetails">
        <link:definition>995790 - Disclosure - Investments - Investment By Industry (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsScheduleOfSlpiisPortfolioAtFairValueDetails" id="DisclosureInvestmentsScheduleOfSlpiisPortfolioAtFairValueDetails">
        <link:definition>995800 - Disclosure - Investments - Schedule of SLPIIs portfolio at fair value (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIisScheduleOfInvestmentsDetails" id="DisclosureInvestmentsSlpIisScheduleOfInvestmentsDetails">
        <link:definition>995810 - Disclosure - Investments - SLP II's Schedule of Investments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIisScheduleOfInvestmentsDetailsDefault" id="DisclosureInvestmentsSlpIisScheduleOfInvestmentsDetailsDefault">
        <link:definition>995810 - Disclosure - Investments - SLP II's Schedule of Investments (Details) [Default]</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIisScheduleOfInvestmentsParentheticalDetails" id="DisclosureInvestmentsSlpIisScheduleOfInvestmentsParentheticalDetails">
        <link:definition>995820 - Disclosure - Investments - SLP II's Schedule of Investments (Parenthetical) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIisScheduleOfInvestmentsParentheticalDetailsDefault" id="DisclosureInvestmentsSlpIisScheduleOfInvestmentsParentheticalDetailsDefault">
        <link:definition>995820 - Disclosure - Investments - SLP II's Schedule of Investments (Parenthetical) (Details) [Default]</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIiBalanceSheetDetails" id="DisclosureInvestmentsSlpIiBalanceSheetDetails">
        <link:definition>995830 - Disclosure - Investments - SLP II Balance Sheet (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIiStatementOfOperationsDetails" id="DisclosureInvestmentsSlpIiStatementOfOperationsDetails">
        <link:definition>995840 - Disclosure - Investments - SLP II Statement of Operations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfInvestmentsByFairValueHierarchyDetails" id="DisclosureFairValueMeasurementsScheduleOfInvestmentsByFairValueHierarchyDetails">
        <link:definition>995850 - Disclosure - Fair Value Measurements - Schedule of Investments by Fair Value Hierarchy (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsDetails" id="DisclosureFairValueMeasurementsDetails">
        <link:definition>995860 - Disclosure - Fair Value Measurements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsReconciliationOfInvestmentDetails" id="DisclosureFairValueMeasurementsReconciliationOfInvestmentDetails">
        <link:definition>995870 - Disclosure - Fair Value Measurements - Reconciliation of Investment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfSignificantUnobservableInputsUsedToValueLevel3AssetsDetails" id="DisclosureFairValueMeasurementsSummaryOfSignificantUnobservableInputsUsedToValueLevel3AssetsDetails">
        <link:definition>995880 - Disclosure - Fair Value Measurements - Summary of Significant Unobservable Inputs Used to Value Level 3 Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfSignificantUnobservableInputsUsedToValueLevel3AssetsParentheticalDetails" id="DisclosureFairValueMeasurementsSummaryOfSignificantUnobservableInputsUsedToValueLevel3AssetsParentheticalDetails">
        <link:definition>995890 - Disclosure - Fair Value Measurements - Summary of Significant Unobservable Inputs Used to Value Level 3 Assets (Parenthetical) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfDebtObligationsCarriedAtFairValueDetails" id="DisclosureFairValueMeasurementsSummaryOfDebtObligationsCarriedAtFairValueDetails">
        <link:definition>995900 - Disclosure - Fair Value Measurements - Summary of Debt Obligations Carried at Fair Value (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementBaseManagementFeeDetails" id="DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementBaseManagementFeeDetails">
        <link:definition>995910 - Disclosure - Agreements and Related Party Transactions Investment Advisory Agreement - Base Management Fee (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementIncentiveFeeDetails" id="DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementIncentiveFeeDetails">
        <link:definition>995920 - Disclosure - Agreements and Related Party Transactions Investment Advisory Agreement - Incentive Fee (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementAdministrationAgreementDetails" id="DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementAdministrationAgreementDetails">
        <link:definition>995930 - Disclosure - Agreements and Related Party Transactions Investment Advisory Agreement - Administration Agreement (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementResourceSharingAgreementDetails" id="DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementResourceSharingAgreementDetails">
        <link:definition>995940 - Disclosure - Agreements and Related Party Transactions Investment Advisory Agreement - Resource Sharing Agreement (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementRelatedPartyCommitmentsDetails" id="DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementRelatedPartyCommitmentsDetails">
        <link:definition>995950 - Disclosure - Agreements and Related Party Transactions Investment Advisory Agreement - Related Party Commitments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementScheduleOfNoncontrolledaffiliateAndControlledAffiliateInvestmentsDet" id="DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementScheduleOfNoncontrolledaffiliateAndControlledAffiliateInvestmentsDet">
        <link:definition>995960 - Disclosure - Agreements and Related Party Transactions Investment Advisory Agreement - Schedule of Non-Controlled/Affiliate and Controlled Affiliate Investments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementManagingDealerAgreementDetails" id="DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementManagingDealerAgreementDetails">
        <link:definition>995970 - Disclosure - Agreements and Related Party Transactions Investment Advisory Agreement - Managing Dealer Agreement (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementScheduleOfShareholderServicingAndorDistributionFeesDetails" id="DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementScheduleOfShareholderServicingAndorDistributionFeesDetails">
        <link:definition>995980 - Disclosure - Agreements and Related Party Transactions Investment Advisory Agreement - Schedule of Shareholder Servicing and/or Distribution Fees (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementDistributionAndServicingPlanDetails" id="DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementDistributionAndServicingPlanDetails">
        <link:definition>995990 - Disclosure - Agreements and Related Party Transactions Investment Advisory Agreement - Distribution and Servicing Plan (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementExpenseSupportAndConditionalReimbursementAgreementDetails" id="DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementExpenseSupportAndConditionalReimbursementAgreementDetails">
        <link:definition>996000 - Disclosure - Agreements and Related Party Transactions Investment Advisory Agreement - Expense Support and Conditional Reimbursement Agreement (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementSummaryOfAllExpensesSupportedAndRecoupedByTheAdviserDetails" id="DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementSummaryOfAllExpensesSupportedAndRecoupedByTheAdviserDetails">
        <link:definition>996010 - Disclosure - Agreements and Related Party Transactions Investment Advisory Agreement - Summary of All Expenses Supported and Recouped By The Adviser (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtDetails" id="DisclosureDebtDetails">
        <link:definition>996020 - Disclosure - Debt (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtOutstandingBorrowingsDetails" id="DisclosureDebtOutstandingBorrowingsDetails">
        <link:definition>996030 - Disclosure - Debt - Outstanding borrowings (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtMaturitiesOfDebtObligationsDetails" id="DisclosureDebtMaturitiesOfDebtObligationsDetails">
        <link:definition>996040 - Disclosure - Debt - Maturities of debt obligations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnGoldmanSachsRevolvingCreditFacilityDetails" id="DisclosureDebtInterestExpenseOnGoldmanSachsRevolvingCreditFacilityDetails">
        <link:definition>996050 - Disclosure - Debt - Interest expense on Goldman Sachs Revolving Credit Facility (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnJpmRevolvingCreditFacilityDetails" id="DisclosureDebtInterestExpenseOnJpmRevolvingCreditFacilityDetails">
        <link:definition>996060 - Disclosure - Debt - Interest expense on JPM Revolving Credit Facility (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnSmbcRevolvingCreditFacilityDetails" id="DisclosureDebtInterestExpenseOnSmbcRevolvingCreditFacilityDetails">
        <link:definition>996070 - Disclosure - Debt - Interest expense on SMBC Revolving Credit Facility (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtScheduleOfComponentsOfCarryingValueDetails" id="DisclosureDebtScheduleOfComponentsOfCarryingValueDetails">
        <link:definition>996080 - Disclosure - Debt - Schedule of Components of Carrying Value (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnSeries2025SeniorNotesDetails" id="DisclosureDebtInterestExpenseOnSeries2025SeniorNotesDetails">
        <link:definition>996090 - Disclosure - Debt - Interest expense on Series 2025 Senior Notes (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesDetails" id="DisclosureDerivativesDetails">
        <link:definition>996100 - Disclosure - Derivatives (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesOffsetOfAssetsAndLiabilitiesDetails" id="DisclosureDerivativesOffsetOfAssetsAndLiabilitiesDetails">
        <link:definition>996110 - Disclosure - Derivatives - Offset of assets and liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesEffectOfTransactionsInDerivativeInstrumentsDetails" id="DisclosureDerivativesEffectOfTransactionsInDerivativeInstrumentsDetails">
        <link:definition>996120 - Disclosure - Derivatives - Effect of transactions in derivative instruments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesNetRealizedAndUnrealizedGainsAndLossesDetails" id="DisclosureDerivativesNetRealizedAndUnrealizedGainsAndLossesDetails">
        <link:definition>996130 - Disclosure - Derivatives - Net Realized and Unrealized Gains and Losses (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfTransactionsInCommonSharesDetails" id="DisclosureNetAssetsScheduleOfTransactionsInCommonSharesDetails">
        <link:definition>996140 - Disclosure - Net Assets - Schedule of Transactions in Common Shares (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfMonthendNavPerShareDetails" id="DisclosureNetAssetsScheduleOfMonthendNavPerShareDetails">
        <link:definition>996150 - Disclosure - Net Assets - Schedule of Month-End NAV Per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfDistributionsDeclaredAndPayableDetails" id="DisclosureNetAssetsScheduleOfDistributionsDeclaredAndPayableDetails">
        <link:definition>996160 - Disclosure - Net Assets - Schedule of Distributions Declared and Payable (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsDetails" id="DisclosureNetAssetsDetails">
        <link:definition>996170 - Disclosure - Net Assets (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfShareRepurchasesDetails" id="DisclosureNetAssetsScheduleOfShareRepurchasesDetails">
        <link:definition>996180 - Disclosure - Net Assets - Schedule of Share Repurchases (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxDetails" id="DisclosureIncomeTaxDetails">
        <link:definition>996190 - Disclosure - Income Tax (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxScheduleOfTaxCharacterOfDistributionsDetails" id="DisclosureIncomeTaxScheduleOfTaxCharacterOfDistributionsDetails">
        <link:definition>996200 - Disclosure - Income Tax - Schedule of Tax Character of Distributions (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxScheduleOfReconcilesNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeDetails" id="DisclosureIncomeTaxScheduleOfReconcilesNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeDetails">
        <link:definition>996210 - Disclosure - Income Tax - Schedule of Reconciles Net Increase in Net Assets Resulting from Operations to Taxable Income (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxScheduleOfAggregateUnrealizedAppreciationAndDepreciationOnInvestmentsAndForwardCurrencyExchangeContractsBasedOnCostFor" id="DisclosureIncomeTaxScheduleOfAggregateUnrealizedAppreciationAndDepreciationOnInvestmentsAndForwardCurrencyExchangeContractsBasedOnCostFor">
        <link:definition>996220 - Disclosure - Income Tax - Schedule of Aggregate Unrealized Appreciation and Depreciation on Investments and Forward Currency Exchange Contracts Based on Cost for U.S. Federal Income Tax Purpose (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCommitmentsAndContingenciesSummaryOfUnfundedCommitmentsUnderLoanAndFinancingAgreementsDetails" id="DisclosureCommitmentsAndContingenciesSummaryOfUnfundedCommitmentsUnderLoanAndFinancingAgreementsDetails">
        <link:definition>996230 - Disclosure - Commitments and Contingencies - Summary of unfunded commitments under loan and financing agreements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCommitmentsAndContingenciesDetails" id="DisclosureCommitmentsAndContingenciesDetails">
        <link:definition>996240 - Disclosure - Commitments and Contingencies - (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFinancialHighlightsScheduleOfFinancialHighlightsDetails" id="DisclosureFinancialHighlightsScheduleOfFinancialHighlightsDetails">
        <link:definition>996250 - Disclosure - Financial Highlights - Schedule of Financial Highlights (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFinancialHighlightsScheduleOfFinancialHighlightsParentheticalDetails" id="DisclosureFinancialHighlightsScheduleOfFinancialHighlightsParentheticalDetails">
        <link:definition>996260 - Disclosure - Financial Highlights - Schedule of Financial Highlights (Parenthetical) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnauditedScheduleOfSelectedQuarterlyFinancialDataUnauditedDetails" id="DisclosureSelectedQuarterlyFinancialDataUnauditedScheduleOfSelectedQuarterlyFinancialDataUnauditedDetails">
        <link:definition>996270 - Disclosure - Selected Quarterly Financial Data (unaudited) - Schedule of Selected Quarterly Financial Data (unaudited) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureWarehousingTransactionDetails" id="DisclosureWarehousingTransactionDetails">
        <link:definition>996280 - Disclosure - Warehousing Transaction (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSubsequentEventsDetails" id="DisclosureSubsequentEventsDetails">
        <link:definition>996290 - Disclosure - Subsequent Events (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:linkbase id="lnk">
        <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/all" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#all" xlink:type="simple"/>
        <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-default" xlink:type="simple"/>
        <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#dimension-domain" xlink:type="simple"/>
        <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/domain-member" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#domain-member" xlink:type="simple"/>
        <link:arcroleRef arcroleURI="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:href="http://www.xbrl.org/2005/xbrldt-2005.xsd#hypercube-dimension" xlink:type="simple"/>
        <link:arcroleRef arcroleURI="http://www.esma.europa.eu/xbrl/esef/arcrole/wider-narrower" xlink:href="http://www.xbrl.org/lrr/arcrole/esma-arcrole-2018-11-21.xsd#wider-narrower" xlink:type="simple"/>
        <link:arcroleRef arcroleURI="https://xbrl.org/2023/arcrole/summation-item" xlink:href="https://www.xbrl.org/2023/calculation-1.1.xsd#summation-item" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DocumentDocumentAndEntityInformation" xlink:href="ck0001899017-20251231.xsd#DocumentDocumentAndEntityInformation" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfAssetsAndLiabilities1" xlink:href="ck0001899017-20251231.xsd#StatementConsolidatedStatementsOfAssetsAndLiabilities1" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfAssetsAndLiabilitiesParenthetical" xlink:href="ck0001899017-20251231.xsd#StatementConsolidatedStatementsOfAssetsAndLiabilitiesParenthetical" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfOperations" xlink:href="ck0001899017-20251231.xsd#StatementConsolidatedStatementsOfOperations" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestments" xlink:href="ck0001899017-20251231.xsd#StatementConsolidatedScheduleOfInvestments" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsDefault" xlink:href="ck0001899017-20251231.xsd#StatementConsolidatedScheduleOfInvestmentsDefault" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsInterestRateSwap" xlink:href="ck0001899017-20251231.xsd#StatementConsolidatedScheduleOfInvestmentsInterestRateSwap" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsInterestRateSwapDefault" xlink:href="ck0001899017-20251231.xsd#StatementConsolidatedScheduleOfInvestmentsInterestRateSwapDefault" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsForwardForeignCurrencyExchangeContracts" xlink:href="ck0001899017-20251231.xsd#StatementConsolidatedScheduleOfInvestmentsForwardForeignCurrencyExchangeContracts" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsForwardForeignCurrencyExchangeContractsParenthetical" xlink:href="ck0001899017-20251231.xsd#StatementConsolidatedScheduleOfInvestmentsForwardForeignCurrencyExchangeContractsParenthetical" xlink:type="simple"/>
        <link:roleRef roleURI="http://xbrl.sec.gov/cef/role/SecurityOnly" xlink:href="https://xbrl.sec.gov/cef/2025/cef-2025.xsd#SecurityOnly" xlink:type="simple"/>
        <link:roleRef roleURI="http://xbrl.sec.gov/cef/role/RiskOnly" xlink:href="https://xbrl.sec.gov/cef/2025/cef-2025.xsd#RiskOnly" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCybersecurityRiskManagementStrategyAndGovernance" xlink:href="ck0001899017-20251231.xsd#DisclosureCybersecurityRiskManagementStrategyAndGovernance" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsTables" xlink:href="ck0001899017-20251231.xsd#DisclosureInvestmentsTables" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtTables" xlink:href="ck0001899017-20251231.xsd#DisclosureDebtTables" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesTables" xlink:href="ck0001899017-20251231.xsd#DisclosureDerivativesTables" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureOrganizationDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureOrganizationDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsInvestmentByTypeDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureInvestmentsInvestmentByTypeDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureInvestmentsDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsInvestmentByGeographicRegionDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureInvestmentsInvestmentByGeographicRegionDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsInvestmentByIndustryDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureInvestmentsInvestmentByIndustryDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsScheduleOfSlpiisPortfolioAtFairValueDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureInvestmentsScheduleOfSlpiisPortfolioAtFairValueDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIisScheduleOfInvestmentsDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureInvestmentsSlpIisScheduleOfInvestmentsDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIisScheduleOfInvestmentsDetailsDefault" xlink:href="ck0001899017-20251231.xsd#DisclosureInvestmentsSlpIisScheduleOfInvestmentsDetailsDefault" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIisScheduleOfInvestmentsParentheticalDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureInvestmentsSlpIisScheduleOfInvestmentsParentheticalDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIisScheduleOfInvestmentsParentheticalDetailsDefault" xlink:href="ck0001899017-20251231.xsd#DisclosureInvestmentsSlpIisScheduleOfInvestmentsParentheticalDetailsDefault" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIiBalanceSheetDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureInvestmentsSlpIiBalanceSheetDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIiStatementOfOperationsDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureInvestmentsSlpIiStatementOfOperationsDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfInvestmentsByFairValueHierarchyDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureFairValueMeasurementsScheduleOfInvestmentsByFairValueHierarchyDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsReconciliationOfInvestmentDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureFairValueMeasurementsReconciliationOfInvestmentDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfSignificantUnobservableInputsUsedToValueLevel3AssetsDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureFairValueMeasurementsSummaryOfSignificantUnobservableInputsUsedToValueLevel3AssetsDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfSignificantUnobservableInputsUsedToValueLevel3AssetsParentheticalDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureFairValueMeasurementsSummaryOfSignificantUnobservableInputsUsedToValueLevel3AssetsParentheticalDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfDebtObligationsCarriedAtFairValueDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureFairValueMeasurementsSummaryOfDebtObligationsCarriedAtFairValueDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementBaseManagementFeeDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementBaseManagementFeeDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementIncentiveFeeDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementIncentiveFeeDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementAdministrationAgreementDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementAdministrationAgreementDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementResourceSharingAgreementDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementResourceSharingAgreementDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementRelatedPartyCommitmentsDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementRelatedPartyCommitmentsDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementScheduleOfNoncontrolledaffiliateAndControlledAffiliateInvestmentsDet" xlink:href="ck0001899017-20251231.xsd#DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementScheduleOfNoncontrolledaffiliateAndControlledAffiliateInvestmentsDet" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementManagingDealerAgreementDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementManagingDealerAgreementDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementScheduleOfShareholderServicingAndorDistributionFeesDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementScheduleOfShareholderServicingAndorDistributionFeesDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementDistributionAndServicingPlanDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementDistributionAndServicingPlanDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementExpenseSupportAndConditionalReimbursementAgreementDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementExpenseSupportAndConditionalReimbursementAgreementDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementSummaryOfAllExpensesSupportedAndRecoupedByTheAdviserDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementSummaryOfAllExpensesSupportedAndRecoupedByTheAdviserDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureDebtDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtOutstandingBorrowingsDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureDebtOutstandingBorrowingsDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtMaturitiesOfDebtObligationsDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureDebtMaturitiesOfDebtObligationsDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnGoldmanSachsRevolvingCreditFacilityDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureDebtInterestExpenseOnGoldmanSachsRevolvingCreditFacilityDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnJpmRevolvingCreditFacilityDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureDebtInterestExpenseOnJpmRevolvingCreditFacilityDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnSmbcRevolvingCreditFacilityDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureDebtInterestExpenseOnSmbcRevolvingCreditFacilityDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtScheduleOfComponentsOfCarryingValueDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureDebtScheduleOfComponentsOfCarryingValueDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnSeries2025SeniorNotesDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureDebtInterestExpenseOnSeries2025SeniorNotesDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureDerivativesDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesOffsetOfAssetsAndLiabilitiesDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureDerivativesOffsetOfAssetsAndLiabilitiesDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesEffectOfTransactionsInDerivativeInstrumentsDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureDerivativesEffectOfTransactionsInDerivativeInstrumentsDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesNetRealizedAndUnrealizedGainsAndLossesDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureDerivativesNetRealizedAndUnrealizedGainsAndLossesDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfTransactionsInCommonSharesDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureNetAssetsScheduleOfTransactionsInCommonSharesDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfMonthendNavPerShareDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureNetAssetsScheduleOfMonthendNavPerShareDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfDistributionsDeclaredAndPayableDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureNetAssetsScheduleOfDistributionsDeclaredAndPayableDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureNetAssetsDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfShareRepurchasesDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureNetAssetsScheduleOfShareRepurchasesDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCommitmentsAndContingenciesSummaryOfUnfundedCommitmentsUnderLoanAndFinancingAgreementsDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureCommitmentsAndContingenciesSummaryOfUnfundedCommitmentsUnderLoanAndFinancingAgreementsDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFinancialHighlightsScheduleOfFinancialHighlightsDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureFinancialHighlightsScheduleOfFinancialHighlightsDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFinancialHighlightsScheduleOfFinancialHighlightsParentheticalDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureFinancialHighlightsScheduleOfFinancialHighlightsParentheticalDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureWarehousingTransactionDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureWarehousingTransactionDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSubsequentEventsDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureSubsequentEventsDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-roles-2025.xsd#eedm" xlink:type="simple"/>
        <link:roleRef roleURI="http://fasb.org/srt/role/srt-eedm/ExtensibleEnumerationLists" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-roles-2025.xsd#eedm1" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedLabel" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.xbrl.org/2009/role/netLabel" xlink:href="http://www.xbrl.org/lrr/role/net-2009-12-16.xsd#netLabel" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTotalLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTotalLabel" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.xbrl.org/2009/role/negatedTerseLabel" xlink:href="http://www.xbrl.org/lrr/role/negated-2009-12-16.xsd#negatedTerseLabel" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfChangesInNetAssets" xlink:href="ck0001899017-20251231.xsd#StatementConsolidatedStatementsOfChangesInNetAssets" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" xlink:href="ck0001899017-20251231.xsd#StatementConsolidatedStatementsOfCashFlows" xlink:type="simple"/>
        <link:roleRef roleURI="http://xbrl.sec.gov/cef/role/N2" xlink:href="https://xbrl.sec.gov/cef/2025/cef-2025.xsd#N2" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureOrganization" xlink:href="ck0001899017-20251231.xsd#DisclosureOrganization" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies1" xlink:href="ck0001899017-20251231.xsd#DisclosureSummaryOfSignificantAccountingPolicies1" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestments" xlink:href="ck0001899017-20251231.xsd#DisclosureInvestments" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurements" xlink:href="ck0001899017-20251231.xsd#DisclosureFairValueMeasurements" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreement" xlink:href="ck0001899017-20251231.xsd#DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreement" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebt" xlink:href="ck0001899017-20251231.xsd#DisclosureDebt" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivatives" xlink:href="ck0001899017-20251231.xsd#DisclosureDerivatives" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssets" xlink:href="ck0001899017-20251231.xsd#DisclosureNetAssets" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTax" xlink:href="ck0001899017-20251231.xsd#DisclosureIncomeTax" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCommitmentsAndContingencies" xlink:href="ck0001899017-20251231.xsd#DisclosureCommitmentsAndContingencies" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFinancialHighlights" xlink:href="ck0001899017-20251231.xsd#DisclosureFinancialHighlights" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnaudited" xlink:href="ck0001899017-20251231.xsd#DisclosureSelectedQuarterlyFinancialDataUnaudited" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureWarehousingTransaction" xlink:href="ck0001899017-20251231.xsd#DisclosureWarehousingTransaction" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSubsequentEvents" xlink:href="ck0001899017-20251231.xsd#DisclosureSubsequentEvents" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" xlink:href="ck0001899017-20251231.xsd#DisclosureSummaryOfSignificantAccountingPoliciesPolicies" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsTables" xlink:href="ck0001899017-20251231.xsd#DisclosureFairValueMeasurementsTables" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementTables" xlink:href="ck0001899017-20251231.xsd#DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementTables" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsTables" xlink:href="ck0001899017-20251231.xsd#DisclosureNetAssetsTables" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxTables" xlink:href="ck0001899017-20251231.xsd#DisclosureIncomeTaxTables" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCommitmentsAndContingenciesTables" xlink:href="ck0001899017-20251231.xsd#DisclosureCommitmentsAndContingenciesTables" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFinancialHighlightsTables" xlink:href="ck0001899017-20251231.xsd#DisclosureFinancialHighlightsTables" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnauditedTables" xlink:href="ck0001899017-20251231.xsd#DisclosureSelectedQuarterlyFinancialDataUnauditedTables" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureSummaryOfSignificantAccountingPoliciesDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureFairValueMeasurementsDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureIncomeTaxDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxScheduleOfTaxCharacterOfDistributionsDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureIncomeTaxScheduleOfTaxCharacterOfDistributionsDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxScheduleOfReconcilesNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureIncomeTaxScheduleOfReconcilesNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxScheduleOfAggregateUnrealizedAppreciationAndDepreciationOnInvestmentsAndForwardCurrencyExchangeContractsBasedOnCostFor" xlink:href="ck0001899017-20251231.xsd#DisclosureIncomeTaxScheduleOfAggregateUnrealizedAppreciationAndDepreciationOnInvestmentsAndForwardCurrencyExchangeContractsBasedOnCostFor" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCommitmentsAndContingenciesDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureCommitmentsAndContingenciesDetails" xlink:type="simple"/>
        <link:roleRef roleURI="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnauditedScheduleOfSelectedQuarterlyFinancialDataUnauditedDetails" xlink:href="ck0001899017-20251231.xsd#DisclosureSelectedQuarterlyFinancialDataUnauditedScheduleOfSelectedQuarterlyFinancialDataUnauditedDetails" xlink:type="simple"/>
        <link:labelLink xlink:role="http://www.xbrl.org/2003/role/link" xlink:title="labelLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesSubscriptions" xlink:label="us-gaap_CommonStockSharesSubscriptions"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedDebtSpreadVariableRate" xlink:label="ck0001899017_SubordinatedDebtSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EquityInterestsInInvestmentVehiclesMember" xlink:label="ck0001899017_EquityInterestsInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BtxPrecisionMember" xlink:label="ck0001899017_BtxPrecisionMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnNovemberThirtyTwoThousandTwentyFourMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnNovemberThirtyTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:label="us-gaap_IncreaseDecreaseInInterestPayableNet"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfSharesValidlyTendered" xlink:label="ck0001899017_PercentageOfSharesValidlyTendered"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GovineerSolutionsLLCMember" xlink:label="ck0001899017_GovineerSolutionsLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="us-gaap_ConcentrationRiskByTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember" xlink:label="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="dei_EntityIncorporationStateCountryCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency" xlink:label="us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CreditAdjustmentSpreadMember" xlink:label="ck0001899017_CreditAdjustmentSpreadMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="us-gaap_BalanceSheetLocationDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WarehousingTransactionTextBlock" xlink:label="ck0001899017_WarehousingTransactionTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ValuationTechniqueComparableCompanyMultipleMember" xlink:label="ck0001899017_ValuationTechniqueComparableCompanyMultipleMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInTradingLiabilities" xlink:label="us-gaap_IncreaseDecreaseInTradingLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SecondLienSeniorSecuredLoansMember" xlink:label="ck0001899017_SecondLienSeniorSecuredLoansMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassDMember" xlink:label="ck0001899017_CommonClassDMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CashEquivalentsAtFairValue" xlink:label="ck0001899017_CashEquivalentsAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BcpcProjectAberdeenLlcMember" xlink:label="ck0001899017_BcpcProjectAberdeenLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BCCTrilliumFoodsInvestments2LPMember" xlink:label="ck0001899017_BCCTrilliumFoodsInvestments2LPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ProfessionalFeesAndOperatingExpensesPolicyTextBlock" xlink:label="ck0001899017_ProfessionalFeesAndOperatingExpensesPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityAbstract" xlink:label="us-gaap_EquityAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus" xlink:label="dei_EntityCurrentReportingStatus"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased" xlink:label="us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RfrLoanMember" xlink:label="ck0001899017_RfrLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="us-gaap_FairValueInputsLevel2Member"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LegacyCorporateLendingHoldcoLlcClassACommonEquityMember" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcClassACommonEquityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReinvestmentOfDividends" xlink:label="ck0001899017_ReinvestmentOfDividends"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity" xlink:label="us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DistributionAndShareholderServicingFees" xlink:label="ck0001899017_DistributionAndShareholderServicingFees"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HollywoodLPMember" xlink:label="ck0001899017_HollywoodLPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JanuaryThirtyFirstTwoThousandTwentyFourMember" xlink:label="ck0001899017_JanuaryThirtyFirstTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_IncentiveFeeCapMember" xlink:label="ck0001899017_IncentiveFeeCapMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany" xlink:label="dei_EntityShellCompany"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BCCCPKInvestments2LPMember" xlink:label="ck0001899017_BCCCPKInvestments2LPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SummerFridaysLLCMember" xlink:label="ck0001899017_SummerFridaysLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SharesValidlyTenderedForRepurchase" xlink:label="ck0001899017_SharesValidlyTenderedForRepurchase"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyTotalReturnBeforeIncentiveFees" xlink:label="us-gaap_InvestmentCompanyTotalReturnBeforeIncentiveFees"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock" xlink:label="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyFourAprilTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentyFourAprilTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNet" xlink:label="us-gaap_AssetsNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayableIncomeBased" xlink:label="us-gaap_IncentiveFeePayableIncomeBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:label="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LegacyCorporateLendingHoldcoLlcMember" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OrganizationCosts" xlink:label="ck0001899017_OrganizationCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetailMember" xlink:label="us-gaap_RetailMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PMAMember" xlink:label="ck0001899017_PMAMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DuracoMember" xlink:label="ck0001899017_DuracoMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestReceivable" xlink:label="us-gaap_InterestReceivable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIndustrySectorExtensibleEnumeration" xlink:label="us-gaap_InvestmentIndustrySectorExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PcfMember" xlink:label="ck0001899017_PcfMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OffsettingAssetsTable" xlink:label="us-gaap_OffsettingAssetsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BLIBuyerIncMember" xlink:label="ck0001899017_BLIBuyerIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PsychiatricMedicalCareLLCMember" xlink:label="ck0001899017_PsychiatricMedicalCareLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIdentifierAxis" xlink:label="us-gaap_InvestmentIdentifierAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DerivativeInstrumentAverageNotionalAmount" xlink:label="ck0001899017_DerivativeInstrumentAverageNotionalAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RocSkincareMember" xlink:label="ck0001899017_RocSkincareMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableInvestmentSale" xlink:label="us-gaap_ReceivableInvestmentSale"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourOneMember" xlink:label="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BCCCPKInvestments2LPEquityInterestMember" xlink:label="ck0001899017_BCCCPKInvestments2LPEquityInterestMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RevolverCommitmentMember" xlink:label="ck0001899017_RevolverCommitmentMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SpotlessBrandsLlcMember" xlink:label="ck0001899017_SpotlessBrandsLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration" xlink:label="us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRate" xlink:label="us-gaap_InvestmentInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesByIndustryAxis" xlink:label="us-gaap_EquitySecuritiesByIndustryAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CashEquivalentsInterestRate" xlink:label="ck0001899017_CashEquivalentsInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:label="us-gaap_SummaryOfInvestmentHoldingsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBNotesMember" xlink:label="ck0001899017_TrancheBNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySevenJuneTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_TwentySevenJuneTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByBalanceSheetGroupingTextBlock" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FacilitiesMember" xlink:label="ck0001899017_FacilitiesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TransportationCargoSectorMember" xlink:label="ck0001899017_TransportationCargoSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag" xlink:label="cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:label="us-gaap_QuarterlyFinancialInformationDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems" xlink:label="us-gaap_DerivativeLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyVoluntaryFeeWaived" xlink:label="us-gaap_InvestmentCompanyVoluntaryFeeWaived"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventLineItems" xlink:label="us-gaap_SubsequentEventLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AllbridgeLlcMember" xlink:label="ck0001899017_AllbridgeLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramTable" xlink:label="srt_ShareRepurchaseProgramTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementThirdPartyEngagedFlag" xlink:label="cyd_CybersecurityRiskManagementThirdPartyEngagedFlag"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReimbursementEligibilityExpirationDateJanuaryThirtyOneThousandTwentySevenMember" xlink:label="ck0001899017_ReimbursementEligibilityExpirationDateJanuaryThirtyOneThousandTwentySevenMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetNotionalAmount" xlink:label="us-gaap_DerivativeAssetNotionalAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="us-gaap_InvestmentIncomeInterest"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WellsFargoMember" xlink:label="ck0001899017_WellsFargoMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy" xlink:label="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NetAssetCommonStockValue" xlink:label="ck0001899017_NetAssetCommonStockValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentOfAssetCoverage" xlink:label="ck0001899017_PercentOfAssetCoverage"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassIMember" xlink:label="ck0001899017_CommonClassIMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WarehousingTransactionAbstract" xlink:label="ck0001899017_WarehousingTransactionAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="us-gaap_DeferredFinanceCostsNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentMaturityDate" xlink:label="us-gaap_InvestmentMaturityDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyFourFebruaryTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentyFourFebruaryTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetFairValueGrossLiability" xlink:label="us-gaap_DerivativeAssetFairValueGrossLiability"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:label="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" xlink:label="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FiestaHoldingsLLCMember" xlink:label="ck0001899017_FiestaHoldingsLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashEquivalents" xlink:label="us-gaap_RestrictedCashEquivalents"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MasterConcessionAirMember" xlink:label="ck0001899017_MasterConcessionAirMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GaapIncentiveFeeMember" xlink:label="ck0001899017_GaapIncentiveFeeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramAxis" xlink:label="srt_ShareRepurchaseProgramAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WSHPCottonwoodBuyerLLCMember" xlink:label="ck0001899017_WSHPCottonwoodBuyerLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorThreeMember" xlink:label="ck0001899017_InterestRateFloorThreeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementStrategyAndGovernanceTable" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesMember" xlink:label="us-gaap_EquitySecuritiesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PrecisionConceptsParentIncMember" xlink:label="ck0001899017_PrecisionConceptsParentIncMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherReceivables" xlink:label="us-gaap_IncreaseDecreaseInOtherReceivables"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDistributionOrdinaryIncome" xlink:label="us-gaap_InvestmentCompanyDistributionOrdinaryIncome"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:label="us-gaap_InvestmentUnaffiliatedIssuerMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:label="us-gaap_DividendsPayableCurrentAndNoncurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasic" xlink:label="us-gaap_EarningsPerShareBasic"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInManagementFeePayable" xlink:label="us-gaap_IncreaseDecreaseInManagementFeePayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="us-gaap_RepaymentsOfLongTermDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:label="us-gaap_RealizedInvestmentGainsLossesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SONIAPlusSixPointFourTwoPercentageMember" xlink:label="ck0001899017_SONIAPlusSixPointFourTwoPercentageMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyTotalReturn" xlink:label="us-gaap_InvestmentCompanyTotalReturn"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain" xlink:label="us-gaap_HedgingDesignationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeeExpense" xlink:label="us-gaap_IncentiveFeeExpense"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GalanthusGroupHoldingsLimitedMember" xlink:label="ck0001899017_GalanthusGroupHoldingsLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DelayedDrawCommitment1Member" xlink:label="ck0001899017_DelayedDrawCommitment1Member"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyExpenseRatioBeforeIncentiveAllocation" xlink:label="us-gaap_InvestmentCompanyExpenseRatioBeforeIncentiveAllocation"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TelecommunicationsMember" xlink:label="ck0001899017_TelecommunicationsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate" xlink:label="ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EngineeredProductsCoLLCMember" xlink:label="ck0001899017_EngineeredProductsCoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingAfterTax" xlink:label="us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingAfterTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" xlink:label="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramDomain" xlink:label="srt_ShareRepurchaseProgramDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForestProductsAndPaperSectorMember" xlink:label="ck0001899017_ForestProductsAndPaperSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EXTAcquisitionsIncMember" xlink:label="ck0001899017_EXTAcquisitionsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorSixMember" xlink:label="ck0001899017_InterestRateFloorSixMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DividendReinvestmentPlanPolicyTextBlock" xlink:label="ck0001899017_DividendReinvestmentPlanPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="us-gaap_StockholdersEquityAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitySmallBusiness" xlink:label="dei_EntitySmallBusiness"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TrusteeFees" xlink:label="us-gaap_TrusteeFees"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeeAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis" xlink:label="us-gaap_HedgingDesignationAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SikichMember" xlink:label="ck0001899017_SikichMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AOMInfusionMember" xlink:label="ck0001899017_AOMInfusionMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AsprPacAcquisitionCoLlcMember" xlink:label="ck0001899017_AsprPacAcquisitionCoLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VitalPurchaserLlcMember" xlink:label="ck0001899017_VitalPurchaserLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsLineItems" xlink:label="us-gaap_OtherCommitmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_G702BuyerIncMember" xlink:label="ck0001899017_G702BuyerIncMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="us-gaap_EquitySecuritiesIndustryMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="dei_EntityWellKnownSeasonedIssuer"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineFebruaryTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_TwentyNineFebruaryTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ManagementFeeExpenseVoluntarilyWaived" xlink:label="ck0001899017_ManagementFeeExpenseVoluntarilyWaived"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfMinimumUtilizationThreshold" xlink:label="ck0001899017_PercentageOfMinimumUtilizationThreshold"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MeasurementInputRecoveryRateMember" xlink:label="ck0001899017_MeasurementInputRecoveryRateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNoteInInvestmentVehiclesMember" xlink:label="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedAmortizationDeferredFinanceCosts" xlink:label="us-gaap_AccumulatedAmortizationDeferredFinanceCosts"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UtilitiesElectricMember" xlink:label="ck0001899017_UtilitiesElectricMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDividends" xlink:label="us-gaap_PaymentsOfDividends"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorSevenMember" xlink:label="ck0001899017_InterestRateFloorSevenMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfDeferredCharges" xlink:label="us-gaap_AmortizationOfDeferredCharges"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember" xlink:label="us-gaap_CommonClassAMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VasaFitnessLLCMember" xlink:label="ck0001899017_VasaFitnessLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CityBbqMember" xlink:label="ck0001899017_CityBbqMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_KAMCHoldingsIncMember" xlink:label="ck0001899017_KAMCHoldingsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskLineItems" xlink:label="us-gaap_ConcentrationRiskLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode" xlink:label="dei_EntityAddressPostalZipCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BeverageFoodandTobaccoSectorMember" xlink:label="ck0001899017_BeverageFoodandTobaccoSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ICATLogisticsIncMember" xlink:label="ck0001899017_ICATLogisticsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskRoleOfManagementTextBlock" xlink:label="cyd_CybersecurityRiskRoleOfManagementTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RisksRelatingToCommonSharesMember" xlink:label="ck0001899017_RisksRelatingToCommonSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EighteenJulyTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_EighteenJulyTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CashAndCashEquivalentsHeldInForeignCurrency" xlink:label="ck0001899017_CashAndCashEquivalentsHeldInForeignCurrency"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SeventeenMarchTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_SeventeenMarchTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PureWaferMember" xlink:label="ck0001899017_PureWaferMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1" xlink:label="dei_EntityAddressAddressLine1"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxPolicyTextBlock" xlink:label="us-gaap_IncomeTaxPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShareAbstract" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShareAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:label="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssets" xlink:label="us-gaap_DerivativeAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OrganizationExpensesPolicyTextBlock" xlink:label="ck0001899017_OrganizationExpensesPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerNameExtensibleEnumeration" xlink:label="us-gaap_InvestmentIssuerNameExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConstructionAndBuildingSectorMember" xlink:label="ck0001899017_ConstructionAndBuildingSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="us-gaap_BalanceSheetLocationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementFeeExpense" xlink:label="us-gaap_ManagementFeeExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis" xlink:label="us-gaap_InvestmentTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SixteenOctoberTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_SixteenOctoberTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BeaconSpecializedLivingMember" xlink:label="ck0001899017_BeaconSpecializedLivingMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BlackbirdPurchaserIncMember" xlink:label="ck0001899017_BlackbirdPurchaserIncMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock" xlink:label="cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySixNovemberTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentySixNovemberTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputComparabilityAdjustmentMember" xlink:label="us-gaap_MeasurementInputComparabilityAdjustmentMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DtiqTechnologiesIncMember" xlink:label="ck0001899017_DtiqTechnologiesIncMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="dei_DocumentType"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="us-gaap_IncomeTaxesPaidNet"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TransportationCargoMember" xlink:label="ck0001899017_TransportationCargoMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="us-gaap_TypeOfArrangementAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease" xlink:label="us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChemicalsPlasticsAndRubberMember" xlink:label="ck0001899017_ChemicalsPlasticsAndRubberMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="us-gaap_LineOfCreditFacilityTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInvestmentExpense" xlink:label="us-gaap_InvestmentIncomeInvestmentExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock" xlink:label="cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossRealized" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossRealized"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueAxis" xlink:label="us-gaap_ValuationTechniqueAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourMember" xlink:label="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="us-gaap_SubsequentEventTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeOperating" xlink:label="us-gaap_InterestIncomeOperating"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_StockRepurchaseProgramHoldingPeriod" xlink:label="ck0001899017_StockRepurchaseProgramHoldingPeriod"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JpmRevolvingCreditFacilityMember" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ZeusFireSecurityMember" xlink:label="ck0001899017_ZeusFireSecurityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineMarchTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_TwentyNineMarchTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAbstract" xlink:label="us-gaap_LiabilitiesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfInvestmentByIndustryTableTextBlock" xlink:label="ck0001899017_ScheduleOfInvestmentByIndustryTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdministrativeFeesExpense" xlink:label="us-gaap_AdministrativeFeesExpense"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FourthAmendedAndRestatedDeclarationOfTrustTerm" xlink:label="ck0001899017_FourthAmendedAndRestatedDeclarationOfTrustTerm"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfUnrealizedAppreciationAndDepreciationOnInvestmentsForTaxPurposeTableTextBlock" xlink:label="ck0001899017_ScheduleOfUnrealizedAppreciationAndDepreciationOnInvestmentsForTaxPurposeTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeeExpenseIncomeBased" xlink:label="us-gaap_IncentiveFeeExpenseIncomeBased"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyExpenseRecoupmentSupport" xlink:label="ck0001899017_InvestmentCompanyExpenseRecoupmentSupport"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BridgerAerospaceGroupHoldingsIncMember" xlink:label="ck0001899017_BridgerAerospaceGroupHoldingsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreferredEquityInterestRate" xlink:label="ck0001899017_PreferredEquityInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputEbitdaMultipleMember" xlink:label="us-gaap_MeasurementInputEbitdaMultipleMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement" xlink:label="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="us-gaap_RealizedInvestmentGainsLosses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeOperatingPaidInCash" xlink:label="us-gaap_InterestIncomeOperatingPaidInCash"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFinStmtErrorCorrectionFlag" xlink:label="dei_DocumentFinStmtErrorCorrectionFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtMaturingInYearsTwoAndThree" xlink:label="us-gaap_LongTermDebtMaturingInYearsTwoAndThree"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_DE" xlink:label="country_DE"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember" xlink:label="ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:label="us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction" xlink:label="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JhccHoldingsLlcMember" xlink:label="ck0001899017_JhccHoldingsLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FiveLargestInvesteeMember" xlink:label="ck0001899017_FiveLargestInvesteeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTextBlock" xlink:label="us-gaap_InvestmentTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable" xlink:label="us-gaap_DerivativeTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerGoodsDurableSectorMember" xlink:label="ck0001899017_ConsumerGoodsDurableSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract" xlink:label="us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgeFundsMember" xlink:label="us-gaap_HedgeFundsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_IL" xlink:label="country_IL"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PrepaidInsurancePolicyTextBlock" xlink:label="ck0001899017_PrepaidInsurancePolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EquityInterestInInvestmentVehiclesMember" xlink:label="ck0001899017_EquityInterestInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PrepaidFinancingCosts" xlink:label="ck0001899017_PrepaidFinancingCosts"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind" xlink:label="ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentQuarterlyReport" xlink:label="dei_DocumentQuarterlyReport"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ManagementFeeExpenseContractuallyWaived" xlink:label="ck0001899017_ManagementFeeExpenseContractuallyWaived"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeCollateralRightToReclaimCash" xlink:label="us-gaap_DerivativeCollateralRightToReclaimCash"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember" xlink:label="ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_NZ" xlink:label="country_NZ"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DebtInstrumentInterestRateSwaps" xlink:label="ck0001899017_DebtInstrumentInterestRateSwaps"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince" xlink:label="dei_EntityAddressStateOrProvince"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionPayable" xlink:label="us-gaap_DistributionPayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossRatio"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WPEFIXBidco23BVFkaKeystoneBidcoBVMember" xlink:label="ck0001899017_WPEFIXBidco23BVFkaKeystoneBidcoBVMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DelayedDrawCommitment2Member" xlink:label="ck0001899017_DelayedDrawCommitment2Member"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OrionMidcoLLCMember" xlink:label="ck0001899017_OrionMidcoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PBIGroupLLCMember" xlink:label="ck0001899017_PBIGroupLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="srt_EquityMethodInvesteeNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalanceShares" xlink:label="us-gaap_InvestmentOwnedBalanceShares"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis" xlink:label="srt_StatementGeographicalAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetInvestmentIncomeAbstract" xlink:label="us-gaap_NetInvestmentIncomeAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubscriptionsReceivedInAdvancePolicyTextBlock" xlink:label="ck0001899017_SubscriptionsReceivedInAdvancePolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:label="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherGeneralAndAdministrativeExpense" xlink:label="us-gaap_OtherGeneralAndAdministrativeExpense"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AerospaceAndDefenseSectorMember" xlink:label="ck0001899017_AerospaceAndDefenseSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AegVisionMember" xlink:label="ck0001899017_AegVisionMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RydooMember" xlink:label="ck0001899017_RydooMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HeliosServicePartnersLLCMember" xlink:label="ck0001899017_HeliosServicePartnersLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AeriTekGlobalCADAcquisitionIncMember" xlink:label="ck0001899017_AeriTekGlobalCADAcquisitionIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentPercentOfPortfolioAmortizedCost" xlink:label="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCEquityInterestInvestmentVehiclesMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCEquityInterestInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ValuationOfOtherFinancialAssetsAndFinancialLiabilitiesPolicyTextBlock" xlink:label="ck0001899017_ValuationOfOtherFinancialAssetsAndFinancialLiabilitiesPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember" xlink:label="us-gaap_SubsequentEventMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RisksRelatingToOurBusinessAndStructureMember" xlink:label="ck0001899017_RisksRelatingToOurBusinessAndStructureMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased" xlink:label="us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" xlink:label="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySevenAugustTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentySevenAugustTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyDistributableEarningsLossAccumulatedShortTermCapitalLossCarryforward" xlink:label="ck0001899017_InvestmentCompanyDistributableEarningsLossAccumulatedShortTermCapitalLossCarryforward"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" xlink:label="us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" xlink:label="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NewMilaniGroupLLCMember" xlink:label="ck0001899017_NewMilaniGroupLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LagerboxMember" xlink:label="ck0001899017_LagerboxMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRatePaidInKind" xlink:label="us-gaap_InvestmentInterestRatePaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis" xlink:label="ck0001899017_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt" xlink:label="us-gaap_InterestExpenseDebt"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfCarryingValuesOfDebtTableTextBlock" xlink:label="ck0001899017_ScheduleOfCarryingValuesOfDebtTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract" xlink:label="us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ShareRedemptionPriceUsedPercentOfMostRecentlyDisclosedNetAssetValue" xlink:label="ck0001899017_ShareRedemptionPriceUsedPercentOfMostRecentlyDisclosedNetAssetValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityNotionalAmount" xlink:label="us-gaap_DerivativeLiabilityNotionalAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentUnamortizedDiscount" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NumberOfFacilityAgreements" xlink:label="ck0001899017_NumberOfFacilityAgreements"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="us-gaap_RelatedPartyTransactionAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain" xlink:label="srt_NameOfMajorCustomerDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilities" xlink:label="us-gaap_DerivativeLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PeriodOfTerminationByNotice" xlink:label="ck0001899017_PeriodOfTerminationByNotice"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DebtInvestmentAmountOfUnfundedRevolversDelayedDrawposition" xlink:label="ck0001899017_DebtInvestmentAmountOfUnfundedRevolversDelayedDrawposition"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GsRevolvingCreditFacilityMember" xlink:label="ck0001899017_GsRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_BE" xlink:label="country_BE"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorOneMember" xlink:label="ck0001899017_InterestRateFloorOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RisksRelatingToTheNinteenFourtyActMember" xlink:label="ck0001899017_RisksRelatingToTheNinteenFourtyActMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsTable" xlink:label="us-gaap_OtherCommitmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorFiveMember" xlink:label="ck0001899017_InterestRateFloorFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_R1RCMIncMember" xlink:label="ck0001899017_R1RCMIncMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AutomotiveSectorMember" xlink:label="us-gaap_AutomotiveSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassSSharesMember" xlink:label="ck0001899017_ClassSSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RelatedPartyTransactionShareholderServicingAndDistributionFeesPercentage" xlink:label="ck0001899017_RelatedPartyTransactionShareholderServicingAndDistributionFeesPercentage"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SimplicityMember" xlink:label="ck0001899017_SimplicityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireFinanceSectorMember" xlink:label="ck0001899017_FireFinanceSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyFifthOctoberTwoThousandTwentyFourMember" xlink:label="ck0001899017_TwentyFifthOctoberTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ThirtyOneJanuaryTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_ThirtyOneJanuaryTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AerospaceSectorMember" xlink:label="us-gaap_AerospaceSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAsset"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductions" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductions"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyIncentiveFeeToAverageNetAssets" xlink:label="us-gaap_InvestmentCompanyIncentiveFeeToAverageNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassISharesMember" xlink:label="ck0001899017_ClassISharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DebtInstrumentEffectiveInterestRateSwapHedge" xlink:label="ck0001899017_DebtInstrumentEffectiveInterestRateSwapHedge"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_QuarterlyFinancialInformationTextBlock" xlink:label="us-gaap_QuarterlyFinancialInformationTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashHeldInForeignCurrency" xlink:label="us-gaap_CashHeldInForeignCurrency"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramLineItems" xlink:label="srt_ShareRepurchaseProgramLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:label="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChiltonMember" xlink:label="ck0001899017_ChiltonMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax" xlink:label="ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="us-gaap_UnrealizedGainLossOnInvestments"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCPreferredEquityInterestInvestmentVehiclesMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCPreferredEquityInterestInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BNPParibasMember" xlink:label="ck0001899017_BNPParibasMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UtilitiesWaterMember" xlink:label="ck0001899017_UtilitiesWaterMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineJanuaryTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentyNineJanuaryTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:label="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesOutstanding" xlink:label="us-gaap_SharesOutstanding"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherIncome" xlink:label="us-gaap_OtherIncome"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LogrhythmIncMember" xlink:label="ck0001899017_LogrhythmIncMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesMember" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalents" xlink:label="us-gaap_RestrictedCashAndCashEquivalents"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="us-gaap_CommitmentsAndContingencies"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SolairusMember" xlink:label="ck0001899017_SolairusMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnMayThirtyOneTwoThousandTwentyFourMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnMayThirtyOneTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_StockRepurchasedDuringPeriodIncludingEarlyRepurchaseDeduction" xlink:label="ck0001899017_StockRepurchasedDuringPeriodIncludingEarlyRepurchaseDeduction"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorFirmId" xlink:label="dei_AuditorFirmId"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheAMember" xlink:label="ck0001899017_TrancheAMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioForecastMember" xlink:label="srt_ScenarioForecastMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReimbursementPercentageOfOtherOperatingExpenses" xlink:label="ck0001899017_ReimbursementPercentageOfOtherOperatingExpenses"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLossSubsidiary" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLossSubsidiary"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SecondLienSeniorSecuredLoanMember" xlink:label="ck0001899017_SecondLienSeniorSecuredLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CapitalEquipmentSectorMember" xlink:label="ck0001899017_CapitalEquipmentSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnFebruaryTwentyNineTwoThousandTwentyFourMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnFebruaryTwentyNineTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RedNucleusMember" xlink:label="ck0001899017_RedNucleusMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_IncreaseDecreaseInPrepaidFinancingCosts" xlink:label="ck0001899017_IncreaseDecreaseInPrepaidFinancingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" xlink:label="us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MinimumSubscriptionsForForwardObligationToPurchasePortfolioInvestments" xlink:label="ck0001899017_MinimumSubscriptionsForForwardObligationToPurchasePortfolioInvestments"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FirstLienSeniorSecuredLoansMember" xlink:label="ck0001899017_FirstLienSeniorSecuredLoansMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_JE" xlink:label="country_JE"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PharmacyPartnersMember" xlink:label="ck0001899017_PharmacyPartnersMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AbrLoanMember" xlink:label="ck0001899017_AbrLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HealthcareAndPharmaceuticalsMember" xlink:label="ck0001899017_HealthcareAndPharmaceuticalsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ValuationTechniqueCollateralCoverageMember" xlink:label="ck0001899017_ValuationTechniqueCollateralCoverageMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNiRestricted" xlink:label="us-gaap_EquitySecuritiesFvNiRestricted"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorNineMember" xlink:label="ck0001899017_InterestRateFloorNineMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_AU" xlink:label="country_AU"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss" xlink:label="us-gaap_ProfitLoss"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DelayedDrawCommitmentMember" xlink:label="ck0001899017_DelayedDrawCommitmentMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassDSharesMember" xlink:label="ck0001899017_ClassDSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MaximumEstimatedManagingDealerFee" xlink:label="ck0001899017_MaximumEstimatedManagingDealerFee"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DividerAmountToDetermineFee" xlink:label="ck0001899017_DividerAmountToDetermineFee"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LogrhythmMember" xlink:label="ck0001899017_LogrhythmMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossSubsidiary" xlink:label="ck0001899017_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossSubsidiary"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramLlcMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AMIBuyerIncMember" xlink:label="ck0001899017_AMIBuyerIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyEightMayTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentyEightMayTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems" xlink:label="dei_DocumentInformationLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRateFloor" xlink:label="us-gaap_InvestmentInterestRateFloor"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DtiqMember" xlink:label="ck0001899017_DtiqMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" xlink:label="us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock" xlink:label="cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventsTextBlock" xlink:label="us-gaap_SubsequentEventsTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain" xlink:label="us-gaap_VariableRateDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LEPSALCoInvestLPMember" xlink:label="ck0001899017_LEPSALCoInvestLPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MaximumFinancingCommitmentAmount" xlink:label="ck0001899017_MaximumFinancingCommitmentAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet" xlink:label="us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OghBidcoLimitedMember" xlink:label="ck0001899017_OghBidcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OfferingCostsPolicyTextBlock" xlink:label="ck0001899017_OfferingCostsPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfPrecedingCalendarQuarters" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfPrecedingCalendarQuarters"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NafincoMember" xlink:label="ck0001899017_NafincoMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:label="us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChexFinerFoodsLLCMember" xlink:label="ck0001899017_ChexFinerFoodsLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WealthEnhancementGroupWegMember" xlink:label="ck0001899017_WealthEnhancementGroupWegMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="us-gaap_ValuationTechniqueDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashEquivalentsMember" xlink:label="us-gaap_CashEquivalentsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentSignificantUnobservableInput" xlink:label="us-gaap_InvestmentSignificantUnobservableInput"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UseOfEstimates" xlink:label="us-gaap_UseOfEstimates"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnAugustThirtyOneTwoThousandTwentyFourMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnAugustThirtyOneTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PRGXMember" xlink:label="ck0001899017_PRGXMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PayRangeMember" xlink:label="ck0001899017_PayRangeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChoreoMember" xlink:label="ck0001899017_ChoreoMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayable" xlink:label="us-gaap_IncentiveFeePayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine2" xlink:label="dei_EntityAddressAddressLine2"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="us-gaap_FairValueDisclosuresTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsReceivable" xlink:label="us-gaap_DividendsReceivable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_NL" xlink:label="country_NL"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AlldentHoldingGmbHMember" xlink:label="ck0001899017_AlldentHoldingGmbHMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheAMember" xlink:label="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheAMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US" xlink:label="country_US"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ACAMSMember" xlink:label="ck0001899017_ACAMSMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" xlink:label="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyChangesInNetAssetsTableTextBlock" xlink:label="us-gaap_InvestmentCompanyChangesInNetAssetsTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputDiscountRateMember" xlink:label="us-gaap_MeasurementInputDiscountRateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:label="us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReconomyMember" xlink:label="ck0001899017_ReconomyMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentConcentrationRiskMember" xlink:label="ck0001899017_InvestmentConcentrationRiskMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration" xlink:label="us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveMember" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionSectorMember" xlink:label="us-gaap_ConstructionSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySecondNovemberTwoThousandTwentyFourMember" xlink:label="ck0001899017_TwentySecondNovemberTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheBMember" xlink:label="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheBMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfReconciliationOfNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeTableTextBlock" xlink:label="ck0001899017_ScheduleOfReconciliationOfNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SauceCoHoldCoLLCMember" xlink:label="ck0001899017_SauceCoHoldCoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock" xlink:label="cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation" xlink:label="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForPeriodFromTwoMonthAnniversaryOfClosingDateToThreeMonthAnniversaryOfClosingDateMember" xlink:label="ck0001899017_ForPeriodFromTwoMonthAnniversaryOfClosingDateToThreeMonthAnniversaryOfClosingDateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnJuneTwoTwoThousandTwentyFiveMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnJuneTwoTwoThousandTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredChargesPolicyTextBlock" xlink:label="us-gaap_DeferredChargesPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AllbridgeMember" xlink:label="ck0001899017_AllbridgeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AviationTechnicalServicesIncMember" xlink:label="ck0001899017_AviationTechnicalServicesIncMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:label="us-gaap_LineOfCreditFacilityAverageOutstandingAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReimbursementEligibilityExpirationDateNovemberThirtyTwoThousandTwentySixMember" xlink:label="ck0001899017_ReimbursementEligibilityExpirationDateNovemberThirtyTwoThousandTwentySixMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeMember" xlink:label="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown" xlink:label="dei_EntityAddressCityOrTown"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerGoodsNonDurableSectorMember" xlink:label="ck0001899017_ConsumerGoodsNonDurableSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_IT" xlink:label="country_IT"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NonControlledAffiliateAndControlledAffiliateInvestmentsMember" xlink:label="ck0001899017_NonControlledAffiliateAndControlledAffiliateInvestmentsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfReportableSegments" xlink:label="us-gaap_NumberOfReportableSegments"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName" xlink:label="dei_SecurityExchangeName"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OnOrAfterFacilitiesEndDateMember" xlink:label="ck0001899017_OnOrAfterFacilitiesEndDateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCSubordinatedNoteInvestmentVehiclesMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCSubordinatedNoteInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdministrativeFeePayable" xlink:label="us-gaap_AdministrativeFeePayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="us-gaap_DebtInstrumentCarryingAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredOfferingCosts" xlink:label="us-gaap_DeferredOfferingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtWeightedAverageInterestRate" xlink:label="us-gaap_DebtWeightedAverageInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfOutstandingSharesTheCompanyOfferedToRepurchase" xlink:label="ck0001899017_PercentageOfOutstandingSharesTheCompanyOfferedToRepurchase"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HlrsHoldcoLimitedMember" xlink:label="ck0001899017_HlrsHoldcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestExpenseRelatedToHedgedItems" xlink:label="ck0001899017_InterestExpenseRelatedToHedgedItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PinnacleAcquisitionLLCMember" xlink:label="ck0001899017_PinnacleAcquisitionLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis" xlink:label="srt_CounterpartyNameAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="us-gaap_ConcentrationRiskTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnusedCommitmentsToExtendCredit" xlink:label="us-gaap_UnusedCommitmentsToExtendCredit"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="us-gaap_MeasurementInputTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAcquisitionDate" xlink:label="us-gaap_InvestmentAcquisitionDate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationExtensibleEnumeration" xlink:label="us-gaap_InvestmentIssuerAffiliationExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MeteorUKBidcoLimitedMember" xlink:label="ck0001899017_MeteorUKBidcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LineOfCreditFacilityCurrentBorrowingCapacityRegardingProvisionToPermitIncreasesOfTermAndRevolvingCommitments" xlink:label="ck0001899017_LineOfCreditFacilityCurrentBorrowingCapacityRegardingProvisionToPermitIncreasesOfTermAndRevolvingCommitments"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesConsumerMember" xlink:label="ck0001899017_ServicesConsumerMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubstantialHoldcoLimitedMember" xlink:label="ck0001899017_SubstantialHoldcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EarlyRepurchaseDeductionValue" xlink:label="ck0001899017_EarlyRepurchaseDeductionValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPaidNet" xlink:label="us-gaap_InterestPaidNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FoyleBidcoLimitedMember" xlink:label="ck0001899017_FoyleBidcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForPeriodFromThreeMonthAnniversaryOfClosingDateToFacilitiesEndDateMember" xlink:label="ck0001899017_ForPeriodFromThreeMonthAnniversaryOfClosingDateToFacilitiesEndDateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract" xlink:label="us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementAndServiceFeesBaseRate" xlink:label="us-gaap_ManagementAndServiceFeesBaseRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_IcfrAuditorAttestationFlag" xlink:label="dei_IcfrAuditorAttestationFlag"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveOneMember" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassSMember" xlink:label="ck0001899017_CommonClassSMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MonarchFincoLLCMember" xlink:label="ck0001899017_MonarchFincoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationAxis" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EraIndustriesLlcMember" xlink:label="ck0001899017_EraIndustriesLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EasyIceMember" xlink:label="ck0001899017_EasyIceMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeRealizedGainLossOperatingBeforeTax" xlink:label="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeRealizedGainLossOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRecognitionPolicyTextBlock" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionRate" xlink:label="us-gaap_RelatedPartyTransactionRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherReceivables" xlink:label="us-gaap_OtherReceivables"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_IE" xlink:label="country_IE"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HumicAcquisitionHoldingsLLCMember" xlink:label="ck0001899017_HumicAcquisitionHoldingsLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAdviceMember" xlink:label="us-gaap_InvestmentAdviceMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MediaDiversifiedAndProductionMember" xlink:label="ck0001899017_MediaDiversifiedAndProductionMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock" xlink:label="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SoftcoMember" xlink:label="ck0001899017_SoftcoMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetTypeExtensibleList" xlink:label="us-gaap_DerivativeAssetTypeExtensibleList"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:label="us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnDecemberTenTwoThousandTwentyFiveMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnDecemberTenTwoThousandTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireFinanceMember" xlink:label="ck0001899017_FireFinanceMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EquityInterestMember" xlink:label="ck0001899017_EquityInterestMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForPeriodFromClosingDateToOneMonthAnniversaryOfClosingDateMember" xlink:label="ck0001899017_ForPeriodFromClosingDateToOneMonthAnniversaryOfClosingDateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCash" xlink:label="us-gaap_RestrictedCash"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassOneSharesMember" xlink:label="ck0001899017_ClassOneSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="us-gaap_ForeignExchangeForwardMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AccidentCareAllianceHoldcoLLCMember" xlink:label="ck0001899017_AccidentCareAllianceHoldcoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateAxis" xlink:label="us-gaap_VariableRateAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendIncomeOperatingPaidInCash" xlink:label="us-gaap_DividendIncomeOperatingPaidInCash"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ETechGroupMember" xlink:label="ck0001899017_ETechGroupMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber" xlink:label="dei_EntityFileNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax" xlink:label="us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeeExpenseCapitalGainBased" xlink:label="us-gaap_IncentiveFeeExpenseCapitalGainBased"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ProfessionalFeesAndOperatingExpenses" xlink:label="ck0001899017_ProfessionalFeesAndOperatingExpenses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CoverAbstract" xlink:label="dei_CoverAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation" xlink:label="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeUnrealizedGainLossOperatingBeforeTax" xlink:label="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeUnrealizedGainLossOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_LU" xlink:label="country_LU"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CorePowerYogaLLCMember" xlink:label="ck0001899017_CorePowerYogaLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NonQualifyingAssetsPercentageOfTotalAsset" xlink:label="ck0001899017_NonQualifyingAssetsPercentageOfTotalAsset"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeAxis" xlink:label="us-gaap_MeasurementInputTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDistributionDate" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDistributionDate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubordinatedDebtMember" xlink:label="us-gaap_SubordinatedDebtMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnMarchThreeTwoThousandTwentyFiveMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnMarchThreeTwoThousandTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OffsettingAssetsLineItems" xlink:label="us-gaap_OffsettingAssetsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeGainLossOnDerivativeNet" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VaticaHealthIncMember" xlink:label="ck0001899017_VaticaHealthIncMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NetAssetAndLiabilitiesPerShare" xlink:label="ck0001899017_NetAssetAndLiabilitiesPerShare"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TermBenchmarkLoanMember" xlink:label="ck0001899017_TermBenchmarkLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="us-gaap_NumberOfOperatingSegments"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HighTechIndustriesMember" xlink:label="ck0001899017_HighTechIndustriesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FiduciaireJean-MarcFaberFJMFMember" xlink:label="ck0001899017_FiduciaireJean-MarcFaberFJMFMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AlternativeInvestmentMeasurementInput" xlink:label="us-gaap_AlternativeInvestmentMeasurementInput"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset" xlink:label="us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" xlink:label="us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AlertSRCNewcoMember" xlink:label="ck0001899017_AlertSRCNewcoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt" xlink:label="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure" xlink:label="ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsDeclaredTableTextBlock" xlink:label="us-gaap_DividendsDeclaredTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTable" xlink:label="us-gaap_SubsequentEventTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ElectronicMerchantSystemsLlcMember" xlink:label="ck0001899017_ElectronicMerchantSystemsLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ElevationNewCoLLCMember" xlink:label="ck0001899017_ElevationNewCoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StockRepurchaseProgramExpirationDate" xlink:label="srt_StockRepurchaseProgramExpirationDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers" xlink:label="ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit" xlink:label="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AwaydayMember" xlink:label="ck0001899017_AwaydayMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfManagingDealerReceiveAFeeOfOfferingProceeds" xlink:label="ck0001899017_PercentageOfManagingDealerReceiveAFeeOfOfferingProceeds"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TartanBidcoPtyLtdMember" xlink:label="ck0001899017_TartanBidcoPtyLtdMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BeverageFoodAndTobaccoMember" xlink:label="ck0001899017_BeverageFoodAndTobaccoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AGSAmericanGlassServicesAcquisitionLLCMember" xlink:label="ck0001899017_AGSAmericanGlassServicesAcquisitionLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity" xlink:label="us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FiftyUSBidcoIncMember" xlink:label="ck0001899017_FiftyUSBidcoIncMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDividendDistribution" xlink:label="us-gaap_InvestmentCompanyDividendDistribution"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FacilityAgreementsMember" xlink:label="ck0001899017_FacilityAgreementsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPaidInKindInterest" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPaidInKindInterest"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RelatedPartyTransactionOperatingExpenseRatio" xlink:label="ck0001899017_RelatedPartyTransactionOperatingExpenseRatio"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MMCLOWH1CreditFacilityMember" xlink:label="ck0001899017_MMCLOWH1CreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfInvestmentByGeographicRegionTableTextBlock" xlink:label="ck0001899017_ScheduleOfInvestmentByGeographicRegionTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireInsuranceMember" xlink:label="ck0001899017_FireInsuranceMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyPortfolioTurnover" xlink:label="us-gaap_InvestmentCompanyPortfolioTurnover"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInReceivableForInvestmentSold" xlink:label="us-gaap_IncreaseDecreaseInReceivableForInvestmentSold"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepurchaseAgreementDateOfRepurchase" xlink:label="us-gaap_RepurchaseAgreementDateOfRepurchase"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeExtensibleEnumeration" xlink:label="us-gaap_InvestmentTypeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfShareRepurchases" xlink:label="ck0001899017_PercentageOfShareRepurchases"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock" xlink:label="us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDeclarationDate" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDeclarationDate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementProcessesIntegratedFlag" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport" xlink:label="dei_DocumentTransitionReport"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PMAParentHoldingsLLCMember" xlink:label="ck0001899017_PMAParentHoldingsLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember" xlink:label="us-gaap_ValuationTechniqueDiscountedCashFlowMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LEPCPCo-InvestLPMember" xlink:label="ck0001899017_LEPCPCo-InvestLPMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsAbstract" xlink:label="us-gaap_ScheduleOfInvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="us-gaap_StatementOfCashFlowsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossUnrealizedExcludingInvestmentPriceChangeBeforeTax" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossUnrealizedExcludingInvestmentPriceChangeBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SensortowerMember" xlink:label="ck0001899017_SensortowerMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNotesInInvestmentVehiclesMember" xlink:label="ck0001899017_SubordinatedNotesInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember" xlink:label="us-gaap_InterestRateSwapMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FinancingProviderMember" xlink:label="ck0001899017_FinancingProviderMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayableCapitalGainBased" xlink:label="us-gaap_IncentiveFeePayableCapitalGainBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashHeldInForeignCurrencyAcquisitionCost" xlink:label="us-gaap_CashHeldInForeignCurrencyAcquisitionCost"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AdvancedAircrewAcademyLlcMember" xlink:label="ck0001899017_AdvancedAircrewAcademyLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseOfCommonSharesPayable" xlink:label="ck0001899017_RepurchaseOfCommonSharesPayable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CashEquivalentsPercentOfNetAssets" xlink:label="ck0001899017_CashEquivalentsPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTableTextBlock" xlink:label="us-gaap_InvestmentTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HGInsightsIncMember" xlink:label="ck0001899017_HGInsightsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfNetAssetValuePerShareTableTextBlock" xlink:label="ck0001899017_ScheduleOfNetAssetValuePerShareTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BankOfNewYorkMember" xlink:label="ck0001899017_BankOfNewYorkMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeOneMember" xlink:label="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChartbeatMember" xlink:label="ck0001899017_ChartbeatMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentBasisSpreadVariableRate" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineDecemberTwoThousandTwentyThreeMember" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyThreeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FederalIncomeTaxAndOtherTaxRisksMember" xlink:label="ck0001899017_FederalIncomeTaxAndOtherTaxRisksMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentRestrictionStatus" xlink:label="us-gaap_InvestmentRestrictionStatus"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EasyIceLLCMember" xlink:label="ck0001899017_EasyIceLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfMinimumUtilizationFee" xlink:label="ck0001899017_PercentageOfMinimumUtilizationFee"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyTaxBasisIncomeTaxable" xlink:label="us-gaap_InvestmentCompanyTaxBasisIncomeTaxable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SecuritiesTransactionsRevenueRecognitionAndExpensesPolicyPolicyTextBlock" xlink:label="ck0001899017_SecuritiesTransactionsRevenueRecognitionAndExpensesPolicyPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDistributionLongTermCapitalGain" xlink:label="us-gaap_InvestmentCompanyDistributionLongTermCapitalGain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PolloTropicalMember" xlink:label="ck0001899017_PolloTropicalMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CPKIPCOBuyerLLCSubordinatedDebtMember" xlink:label="ck0001899017_CPKIPCOBuyerLLCSubordinatedDebtMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorTwoMember" xlink:label="ck0001899017_InterestRateFloorTwoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveOneMember" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedMember" xlink:label="ck0001899017_SubordinatedMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ThirtyAprilTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_ThirtyAprilTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RecoupmentOfExpenseSupportMember" xlink:label="ck0001899017_RecoupmentOfExpenseSupportMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CubeMember" xlink:label="ck0001899017_CubeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeMaturityDates" xlink:label="us-gaap_DerivativeMaturityDates"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineFebruaryTwoThousandTwentyFourMember" xlink:label="ck0001899017_TwentyNineFebruaryTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansAndLeasesReceivableNonperformingLoanAndLeasePolicy" xlink:label="us-gaap_LoansAndLeasesReceivableNonperformingLoanAndLeasePolicy"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_IncentiveFeeBasedOnIncomeMember" xlink:label="ck0001899017_IncentiveFeeBasedOnIncomeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RisksRelatingToInvestmentsMember" xlink:label="ck0001899017_RisksRelatingToInvestmentsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementPolicyPolicyTextBlock" xlink:label="us-gaap_FairValueMeasurementPolicyPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyIncomeAndExpenseAbstract" xlink:label="us-gaap_InvestmentCompanyIncomeAndExpenseAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetInvestmentIncome" xlink:label="us-gaap_NetInvestmentIncome"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AGSAmericanServicesInvestmentsLPMember" xlink:label="ck0001899017_AGSAmericanServicesInvestmentsLPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BCCHGSInvestments2LPMember" xlink:label="ck0001899017_BCCHGSInvestments2LPMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="us-gaap_FairValueDisclosuresAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CA" xlink:label="country_CA"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ElevationNewCoIntermediateLLCMember" xlink:label="ck0001899017_ElevationNewCoIntermediateLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GovineerSolutionsFkaBlackMountainMember" xlink:label="ck0001899017_GovineerSolutionsFkaBlackMountainMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NumberOfBorrowers" xlink:label="ck0001899017_NumberOfBorrowers"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDistributionToShareholdersPerShare" xlink:label="us-gaap_InvestmentCompanyDistributionToShareholdersPerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:label="us-gaap_InvestmentOwnedPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDueToAffiliates" xlink:label="us-gaap_IncreaseDecreaseInDueToAffiliates"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit" xlink:label="us-gaap_LineOfCredit"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyTaxBasisExpenseNotDeductible" xlink:label="us-gaap_InvestmentCompanyTaxBasisExpenseNotDeductible"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="us-gaap_AssetsFairValueDisclosure"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativesPolicyTextBlock" xlink:label="us-gaap_DerivativesPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="us-gaap_DebtInstrumentFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OdysseyBehavioralHealthMember" xlink:label="ck0001899017_OdysseyBehavioralHealthMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ProfessionalFeesAndOtherExpenses" xlink:label="ck0001899017_ProfessionalFeesAndOtherExpenses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PayableInvestmentPurchase" xlink:label="us-gaap_PayableInvestmentPurchase"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OpenSwapContractIdentifierAxis" xlink:label="us-gaap_OpenSwapContractIdentifierAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle" xlink:label="dei_Security12bTitle"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MeasurementInputBookValueMultipleMember" xlink:label="ck0001899017_MeasurementInputBookValueMultipleMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedInvestmentsPercentOfNetAssets" xlink:label="us-gaap_RestrictedInvestmentsPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConstructionBuildingMember" xlink:label="ck0001899017_ConstructionBuildingMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ApprissMember" xlink:label="ck0001899017_ApprissMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreIncentiveFeeNetInvestmentIncomeLessThanOrEqualToCatchUpAmountMember" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeLessThanOrEqualToCatchUpAmountMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDistributionPolicyTextBlock" xlink:label="us-gaap_InvestmentCompanyDistributionPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationTable" xlink:label="dei_DocumentInformationTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RetailNextMember" xlink:label="ck0001899017_RetailNextMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PlaskolitePPCIntermediateIILLCMember" xlink:label="ck0001899017_PlaskolitePPCIntermediateIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue" xlink:label="ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RetailNextHoldingsIncMember" xlink:label="ck0001899017_RetailNextHoldingsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VacationRentalBrandsLlcMember" xlink:label="ck0001899017_VacationRentalBrandsLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="us-gaap_IncomeTaxDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfTaxableDistributionsTableTextBlock" xlink:label="ck0001899017_ScheduleOfTaxableDistributionsTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmendedAndRestatedBylawsDescription" xlink:label="ck0001899017_AmendedAndRestatedBylawsDescription"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="us-gaap_UnrecognizedTaxBenefits"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfOutstandingSharesPurchased" xlink:label="ck0001899017_PercentageOfOutstandingSharesPurchased"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OwlAcquisitionLLCMember" xlink:label="ck0001899017_OwlAcquisitionLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LargestInvesteeMember" xlink:label="ck0001899017_LargestInvesteeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_GB" xlink:label="country_GB"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_GG" xlink:label="country_GG"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentsOwnedExcludingInvestmentsUnobservableInputsNotDeveloped" xlink:label="ck0001899017_InvestmentsOwnedExcludingInvestmentsUnobservableInputsNotDeveloped"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingAssetsCurrent" xlink:label="us-gaap_HedgingAssetsCurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" xlink:label="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfShareholderServicingAndOrDistributionFeeTableTextBlock" xlink:label="ck0001899017_ScheduleOfShareholderServicingAndOrDistributionFeeTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="us-gaap_SubsequentEventTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RisksRelatingToInfectiousDiseasesAndPandemicsMember" xlink:label="ck0001899017_RisksRelatingToInfectiousDiseasesAndPandemicsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ThirtyMayTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_ThirtyMayTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalanceAbstract" xlink:label="us-gaap_InvestmentOwnedBalanceAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityExTransitionPeriod" xlink:label="dei_EntityExTransitionPeriod"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit" xlink:label="us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDebtExpense" xlink:label="us-gaap_InterestAndDebtExpense"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage" xlink:label="ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorEightMember" xlink:label="ck0001899017_InterestRateFloorEightMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SummaryOfAllExpensesSupportedAndRecoupedByTheAdviserTableTextBlock" xlink:label="ck0001899017_SummaryOfAllExpensesSupportedAndRecoupedByTheAdviserTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfTrailingQuarters" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfTrailingQuarters"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="us-gaap_FairValueByAssetClassAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialHighlightsTextBlock" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Investments" xlink:label="us-gaap_Investments"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForPeriodFromOneMonthAnniversaryOfClosingDateToTwoMonthAnniversaryOfClosingDateMember" xlink:label="ck0001899017_ForPeriodFromOneMonthAnniversaryOfClosingDateToTwoMonthAnniversaryOfClosingDateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PPTGroupMember" xlink:label="ck0001899017_PPTGroupMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidInsurance" xlink:label="us-gaap_PrepaidInsurance"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AtsMember" xlink:label="ck0001899017_AtsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdministrativeServiceMember" xlink:label="us-gaap_AdministrativeServiceMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis" xlink:label="srt_MajorCustomersAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets" xlink:label="ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDividendsReceivable" xlink:label="us-gaap_IncreaseDecreaseInDividendsReceivable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInterestAndDividend" xlink:label="us-gaap_InvestmentIncomeInterestAndDividend"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentSecuritiesWeightedAverageYield" xlink:label="ck0001899017_InvestmentSecuritiesWeightedAverageYield"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetCounterpartyNameExtensibleList" xlink:label="us-gaap_DerivativeAssetCounterpartyNameExtensibleList"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:label="us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DesignatedAsHedgingInstrumentMember" xlink:label="us-gaap_DesignatedAsHedgingInstrumentMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseCurrent" xlink:label="us-gaap_PrepaidExpenseCurrent"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FirstLienSeniorSecuredLoanMember" xlink:label="ck0001899017_FirstLienSeniorSecuredLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmberstoneCo.Ltd.Member" xlink:label="ck0001899017_AmberstoneCo.Ltd.Member"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetailSectorMember" xlink:label="us-gaap_RetailSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDividendDistributionAbstract" xlink:label="us-gaap_InvestmentCompanyDividendDistributionAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidInsurance" xlink:label="us-gaap_IncreaseDecreaseInPrepaidInsurance"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityExpirationDate1" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate1"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LindstromLLCMember" xlink:label="ck0001899017_LindstromLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AgrofreshSolutionsMember" xlink:label="ck0001899017_AgrofreshSolutionsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConsolidationPolicyTextBlock" xlink:label="us-gaap_ConsolidationPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyCommittedCapital" xlink:label="us-gaap_InvestmentCompanyCommittedCapital"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PayRangeLLCMember" xlink:label="ck0001899017_PayRangeLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GeneralRiskFactorsMember" xlink:label="ck0001899017_GeneralRiskFactorsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentNonIncomeProducing" xlink:label="us-gaap_InvestmentNonIncomeProducing"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FinancingReceivableNonAccrualNumberOfLoans" xlink:label="ck0001899017_FinancingReceivableNonAccrualNumberOfLoans"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BankingFinanceInsuranceAndRealEstateMember" xlink:label="ck0001899017_BankingFinanceInsuranceAndRealEstateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:label="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSaleOfDerivatives" xlink:label="us-gaap_GainLossOnSaleOfDerivatives"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnAugustTwentyNineTwoThousandTwentyFiveMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnAugustTwentyNineTwoThousandTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialRatiosAbstract" xlink:label="us-gaap_InvestmentCompanyFinancialRatiosAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="us-gaap_AmortizationOfFinancingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityPublicFloat" xlink:label="dei_EntityPublicFloat"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable" xlink:label="us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HeadsUpTechnologiesIncMember" xlink:label="ck0001899017_HeadsUpTechnologiesIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfUnderwiringCompensationOnGrossProceedsOfPrimaryOffering" xlink:label="ck0001899017_PercentageOfUnderwiringCompensationOnGrossProceedsOfPrimaryOffering"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ContainersPackagingAndGlassMember" xlink:label="ck0001899017_ContainersPackagingAndGlassMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDebtTableTextBlock" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_FR" xlink:label="country_FR"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:label="us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="us-gaap_DebtDisclosureTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChaseIndustriesIncMember" xlink:label="ck0001899017_ChaseIndustriesIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsSubsidiary" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsSubsidiary"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpensePolicyTextBlock" xlink:label="us-gaap_InterestExpensePolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityVoluntaryFilers" xlink:label="dei_EntityVoluntaryFilers"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForestProductsAndPaperMember" xlink:label="ck0001899017_ForestProductsAndPaperMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate" xlink:label="ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="us-gaap_OtherNonoperatingIncomeExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="us-gaap_AdditionalPaidInCapital"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="us-gaap_SubsequentEventsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ElectronicMerchantSystemsMember" xlink:label="ck0001899017_ElectronicMerchantSystemsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerControlledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeVariableInterestRate" xlink:label="us-gaap_DerivativeVariableInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PurchasePrice" xlink:label="ck0001899017_PurchasePrice"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VesscoMidcoHoldingsLlcMember" xlink:label="ck0001899017_VesscoMidcoHoldingsLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentPercentOfPortfolioFairValue" xlink:label="ck0001899017_InvestmentPercentOfPortfolioFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="us-gaap_CostsAndExpensesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AdvancedAircrewMember" xlink:label="ck0001899017_AdvancedAircrewMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="dei_EntityCommonStockSharesOutstanding"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubAdministratorMember" xlink:label="ck0001899017_SubAdministratorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityPeriodIncreaseDecrease" xlink:label="us-gaap_StockholdersEquityPeriodIncreaseDecrease"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDividendIncomeOperatingPaidInKind" xlink:label="us-gaap_InterestAndDividendIncomeOperatingPaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetAssetValuePerShare" xlink:label="us-gaap_NetAssetValuePerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyExpenseRatioIncludingVoluntaryFeeWaiver" xlink:label="us-gaap_InvestmentCompanyExpenseRatioIncludingVoluntaryFeeWaiver"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedCapitalLossCarryforward" xlink:label="us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedCapitalLossCarryforward"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDateOfRecord" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDateOfRecord"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementAbstract" xlink:label="us-gaap_IncomeStatementAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityFairValueOfCollateral" xlink:label="us-gaap_DerivativeLiabilityFairValueOfCollateral"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SpindriftMember" xlink:label="ck0001899017_SpindriftMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FactsGlobalEnergyMember" xlink:label="ck0001899017_FactsGlobalEnergyMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_WeightedAverageMember" xlink:label="srt_WeightedAverageMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDerivativeAssets" xlink:label="us-gaap_IncreaseDecreaseInDerivativeAssets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentSoldCarryingAmount" xlink:label="us-gaap_EquityMethodInvestmentSoldCarryingAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LegacyCorporateLendingHoldcoLlcPreferredEquityMember" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcPreferredEquityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MediaAdvertisingPrintingAndPublishingMember" xlink:label="ck0001899017_MediaAdvertisingPrintingAndPublishingMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TotalSeniorSecuritiesMember" xlink:label="ck0001899017_TotalSeniorSecuritiesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="us-gaap_EarningsPerShareDiluted"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode" xlink:label="dei_CityAreaCode"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorFourMember" xlink:label="ck0001899017_InterestRateFloorFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorName" xlink:label="dei_AuditorName"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtMaturingInYearsFourAndFive" xlink:label="us-gaap_LongTermDebtMaturingInYearsFourAndFive"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xlink:label="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GaleriaMember" xlink:label="ck0001899017_GaleriaMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesBusinessMember" xlink:label="ck0001899017_ServicesBusinessMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EarningsBeforeInterestTaxDepreciationAndAmortizationOfMiddleMarketCompanies" xlink:label="ck0001899017_EarningsBeforeInterestTaxDepreciationAndAmortizationOfMiddleMarketCompanies"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EnduranceHoldcoLimitedMember" xlink:label="ck0001899017_EnduranceHoldcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AllworthFinancialGroupLpMember" xlink:label="ck0001899017_AllworthFinancialGroupLpMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:label="us-gaap_DerivativeFairValueOfDerivativeLiability"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardDateAxis" xlink:label="us-gaap_AwardDateAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsAbstract" xlink:label="us-gaap_InvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentOnVehiclesMember" xlink:label="ck0001899017_InvestmentOnVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AMIMember" xlink:label="ck0001899017_AMIMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EheHealthMember" xlink:label="ck0001899017_EheHealthMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_StockRepurchaseProgramMonthlyRedemptionsPercentOfNetAssetValueMaximum" xlink:label="ck0001899017_StockRepurchaseProgramMonthlyRedemptionsPercentOfNetAssetValueMaximum"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardDateDomain" xlink:label="us-gaap_AwardDateDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DiscoverySeniorLivingMember" xlink:label="ck0001899017_DiscoverySeniorLivingMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheANotesMember" xlink:label="ck0001899017_TrancheANotesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ApolloIntelligenceMember" xlink:label="ck0001899017_ApolloIntelligenceMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_IncentiveFeesVoluntarilyWaived" xlink:label="ck0001899017_IncentiveFeesVoluntarilyWaived"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HotelGamingAndLeisureMember" xlink:label="ck0001899017_HotelGamingAndLeisureMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAxis" xlink:label="us-gaap_CashAndCashEquivalentsAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RedMedOperationsCollageRehabilitationMember" xlink:label="ck0001899017_RedMedOperationsCollageRehabilitationMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SeventeenJulyTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_SeventeenJulyTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedDebtBasisSpreadVariableRate" xlink:label="ck0001899017_SubordinatedDebtBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfStockIssuanceCosts" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="us-gaap_FairValueInputsLevel1Member"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockLineItems" xlink:label="us-gaap_ClassOfStockLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesPayable" xlink:label="us-gaap_NotesPayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="us-gaap_ShortTermDebtLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UnreimbursedExpenseSupportMember" xlink:label="ck0001899017_UnreimbursedExpenseSupportMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorLocation" xlink:label="dei_AuditorLocation"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MetalsAndMiningMember" xlink:label="ck0001899017_MetalsAndMiningMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementFeePayable" xlink:label="us-gaap_ManagementFeePayable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentVehiclesMember" xlink:label="ck0001899017_InvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyThreeAugustTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_TwentyThreeAugustTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentsOperationsMember" xlink:label="ck0001899017_InvestmentsOperationsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VesscoWaterMember" xlink:label="ck0001899017_VesscoWaterMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent" xlink:label="dei_EntityInteractiveDataCurrent"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReceivedPurchaseOrders" xlink:label="ck0001899017_ReceivedPurchaseOrders"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HempzMember" xlink:label="ck0001899017_HempzMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:label="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConcessionsDevelopmentGroupLLCMember" xlink:label="ck0001899017_ConcessionsDevelopmentGroupLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_Series2025SeniorNotesMember" xlink:label="ck0001899017_Series2025SeniorNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CRHHealthcarePurchaserIncMember" xlink:label="ck0001899017_CRHHealthcarePurchaserIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CityBarbequeLlcMember" xlink:label="ck0001899017_CityBarbequeLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SaturnPurchaserCorpMember" xlink:label="ck0001899017_SaturnPurchaserCorpMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTreasuryStockByClassTextBlock" xlink:label="us-gaap_ScheduleOfTreasuryStockByClassTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashEquivalentsAtCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HellersMember" xlink:label="ck0001899017_HellersMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber" xlink:label="dei_EntityTaxIdentificationNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuesAbstract" xlink:label="us-gaap_RevenuesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerSectorDurableMember" xlink:label="ck0001899017_ConsumerSectorDurableMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SONIAPlusSixPointThreeEightPercentageMember" xlink:label="ck0001899017_SONIAPlusSixPointThreeEightPercentageMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmountOfExpenseSupportMember" xlink:label="ck0001899017_AmountOfExpenseSupportMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WholesaleMember" xlink:label="ck0001899017_WholesaleMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CatchUpAmountPercentMultipliedToNav" xlink:label="ck0001899017_CatchUpAmountPercentMultipliedToNav"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOrSaleOfEquity" xlink:label="us-gaap_ProceedsFromIssuanceOrSaleOfEquity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber" xlink:label="dei_LocalPhoneNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="us-gaap_RelatedPartyTransactionDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AvalonBidcoLimitedMember" xlink:label="ck0001899017_AvalonBidcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveOneMember" xlink:label="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveOneMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossInvestmentIncomeOperating" xlink:label="us-gaap_GrossInvestmentIncomeOperating"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorOpinionTextBlock" xlink:label="dei_AuditorOpinionTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement" xlink:label="us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfFinancingCosts" xlink:label="us-gaap_PaymentsOfFinancingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputRevenueMultipleMember" xlink:label="us-gaap_MeasurementInputRevenueMultipleMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BcsfAdvisorsLpMember" xlink:label="ck0001899017_BcsfAdvisorsLpMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:label="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAccretionAmortizationOfDiscountPremium" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAccretionAmortizationOfDiscountPremium"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RNEnterprisesLLCMember" xlink:label="ck0001899017_RNEnterprisesLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreIncentiveFeeNetInvestmentIncomeEqualToLessThanCatchUpAmountMember" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeEqualToLessThanCatchUpAmountMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EURIBORPlusSixPointTwoFivePercentageMember" xlink:label="ck0001899017_EURIBORPlusSixPointTwoFivePercentageMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBMember" xlink:label="ck0001899017_TrancheBMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyContractualFeeWaived" xlink:label="us-gaap_InvestmentCompanyContractualFeeWaived"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentUnfundedCommitments" xlink:label="ck0001899017_InvestmentUnfundedCommitments"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WUHoldcoIncMember" xlink:label="ck0001899017_WUHoldcoIncMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_AffiliatedEntityMember" xlink:label="srt_AffiliatedEntityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="us-gaap_ScheduleOfStockByClassTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesAuthorizedUnlimited" xlink:label="us-gaap_CommonStockSharesAuthorizedUnlimited"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EnvironmentalIndustriesSectorMember" xlink:label="ck0001899017_EnvironmentalIndustriesSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BankBillSwapBidRateBBSYMember" xlink:label="ck0001899017_BankBillSwapBidRateBBSYMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EuroInterbankOfferedRateEuriborMember" xlink:label="ck0001899017_EuroInterbankOfferedRateEuriborMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BankBillBenchmarkRateMember" xlink:label="ck0001899017_BankBillBenchmarkRateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireFinanceControlledAffiliateMember" xlink:label="ck0001899017_FireFinanceControlledAffiliateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SterlingOvernightIndexAverageMember" xlink:label="ck0001899017_SterlingOvernightIndexAverageMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BankBillSwapBidRateMember" xlink:label="ck0001899017_BankBillSwapBidRateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EuroInterbankOfferedRateMember" xlink:label="ck0001899017_EuroInterbankOfferedRateMember"/>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesSubscriptions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Value, Subscriptions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesSubscriptions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subscriptions received</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedDebtSpreadVariableRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subordinated debt spread variable rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedDebtSpreadVariableRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subordinated Debt Spread Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedDebtSpreadVariableRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Subordinated debt spread variable rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EquityInterestsInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Interests in Investment Vehicles [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EquityInterestsInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Equity Interests in Investment Vehicles.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EquityInterestsInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Equity Interests in Investment Vehicles</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EquityInterestsInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Interests in Investment Vehicles</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BtxPrecisionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BTX Precision</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BtxPrecisionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">BTX Precision [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BtxPrecisionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BTX Precision.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnNovemberThirtyTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repurchase Request Deadline on November Thirty Two Thousand Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnNovemberThirtyTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Repurchase request deadline on november thirty two thousand twenty four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnNovemberThirtyTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchase Deadline Request November 30, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInInterestPayableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInInterestPayableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Interest Payable, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfSharesValidlyTendered_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of shares validly tendered</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfSharesValidlyTendered_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Shares Validly Tendered</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfSharesValidlyTendered_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of shares validly tendered.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GovineerSolutionsLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Govineer Solutions, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GovineerSolutionsLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Govineer Solutions, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GovineerSolutionsLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Govineer Solutions, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to preferred equity interest in investment vehicles.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Equity Interest in Investment Vehicles [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Preferred Equity Interest in Investment Vehicles</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred Equity Interest Investment Vehicles</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Related Party Transactions [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Non-Controlled/Affiliate and Controlled Affiliate Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityIncorporationStateCountryCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Incorporation, State or Country Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Realized and unrealized gains and losses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss), Investment and Derivative, Operating, and Foreign Currency Transaction, before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Gain (Loss), Investment and Derivative, Operating, and Foreign Currency Transaction, before Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CreditAdjustmentSpreadMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Credit Adjustment Spread</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CreditAdjustmentSpreadMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Adjustment Spread [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CreditAdjustmentSpreadMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Credit adjustment spread</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position Location, Balance [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WarehousingTransactionTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The entire disclosure on warehousing transaction.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WarehousingTransactionTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warehousing Transaction [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WarehousingTransactionTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warehousing Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ValuationTechniqueComparableCompanyMultipleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Valuation approach using comparable company multiple.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ValuationTechniqueComparableCompanyMultipleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Technique, Comparable Company Multiple [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ValuationTechniqueComparableCompanyMultipleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Comparable company multiple</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInTradingLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Trading Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInTradingLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate swap</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Fair Value Measurements of Investments by Major Class, Cash Equivalents and Derivatives</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurements, Recurring and Nonrecurring [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SecondLienSeniorSecuredLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Information regarding second lien senior secured loans.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SecondLienSeniorSecuredLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Second Lien Senior Secured Loans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SecondLienSeniorSecuredLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Second Lien Senior Secured Loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CommonClassDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Classification of common stock representing ownership interest in a corporation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CommonClassDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Class D [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CommonClassDMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Class D</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CashEquivalentsAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Equivalents At Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CashEquivalentsAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash Equivalents At Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CashEquivalentsAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment at fair value, Cash Equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BcpcProjectAberdeenLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">BCPC Project Aberdeen, LLC. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BcpcProjectAberdeenLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BCPC project aberdeen, Llc. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BcpcProjectAberdeenLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BCPC Project Aberdeen, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BCCTrilliumFoodsInvestments2LPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BCC Trillium Foods Investments 2, LP.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BCCTrilliumFoodsInvestments2LPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">BCC Trillium Foods Investments 2, LP [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BCCTrilliumFoodsInvestments2LPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BCC Trillium Foods Investments 2, LP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ProfessionalFeesAndOperatingExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for professional fees and operating expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ProfessionalFeesAndOperatingExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Professional Fees and Operating Expenses [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ProfessionalFeesAndOperatingExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Professional Fees and Operating Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCurrentReportingStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Current Reporting Status</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Incentive Fee Payable, Capital-Gain-Based</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued capital gains incentive fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RfrLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">RFR loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RfrLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">RFR Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RfrLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">RFR Loan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 2</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 2 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcClassACommonEquityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legacy Corporate Lending HoldCo</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcClassACommonEquityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legacy Corporate Lending Holdco Llc Class A Common Equity [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcClassACommonEquityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Legacy Corporate Lending Holdco Llc Class A Common Equity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReinvestmentOfDividends_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reinvestment of Dividends</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReinvestmentOfDividends_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reinvestment of dividends.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReinvestmentOfDividends_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reinvestment of dividends during the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from principal payments and sales of investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Disposition of Investment, Operating Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Financial Highlights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Financial Highlights [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DistributionAndShareholderServicingFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Distribution and shareholder servicing fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DistributionAndShareholderServicingFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Distribution And Shareholder Servicing Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DistributionAndShareholderServicingFees_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Distribution and shareholder servicing fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HollywoodLPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hollywood LP [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HollywoodLPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Hollywood LP.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HollywoodLPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hollywood LP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_JanuaryThirtyFirstTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">January 31, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_JanuaryThirtyFirstTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">January Thirty First Two Thousand Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_JanuaryThirtyFirstTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">January thirty first two thousand twenty four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Affiliated Issuer, Noncontrolled [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Affiliated Issuer, Noncontrolled [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Investment Non-Controlled/Affiliate Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalPeriodFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Period Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_IncentiveFeeCapMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive Fee Cap</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_IncentiveFeeCapMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee Cap [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_IncentiveFeeCapMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Incentive fee cap.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate (as a percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate, Stated Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fixed interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityShellCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Shell Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Nonconsolidated Subsidiary [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BCCCPKInvestments2LPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">BCC CPK Investments 2 LP [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BCCCPKInvestments2LPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BCC CPK Investments 2, LP.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BCCCPKInvestments2LPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BCC CPK Investments 2, LP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SummerFridaysLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summer Fridays, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SummerFridaysLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Summer Fridays, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SummerFridaysLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summer Fridays, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash and Cash Equivalents, at Carrying Value, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SharesValidlyTenderedForRepurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares validly tendered</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SharesValidlyTenderedForRepurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares Validly Tendered for Repurchase</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SharesValidlyTenderedForRepurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Number of shares validly tendered to be purchased under share repurchase plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTotalReturnBeforeIncentiveFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hurdle rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTotalReturnBeforeIncentiveFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Total Return before Incentive Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Contractual Maturities of Debt Obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Maturities of Long-Term Debt [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyFourAprilTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">April 24, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyFourAprilTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty four april two thousand and twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyFourAprilTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Four April Two Thousand And Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net assets at end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeePayableIncomeBased_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee Payable, Income-Based</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeePayableIncomeBased_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fee payable on income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management, Strategy, and Governance [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesIssued_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Positions or Committees Responsible Report to Board [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Board of Directors Oversight [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Class [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Legacy Corporate Lending HoldCo, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legacy Corporate Lending HoldCo, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legacy Corporate Lending HoldCo, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OrganizationCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of organizational costs incurred during the period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OrganizationCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OrganizationCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetailMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retail</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetailMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retail [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PMAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">PMA.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PMAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PMA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PMAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">PMA [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DuracoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Duraco [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DuracoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Duraco.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DuracoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Duraco</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Interest receivable on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net increase in net assets resulting from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net increase in net assets resulting from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Investment Income (Loss) from Operations, Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIndustrySectorExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Industry Sector [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PcfMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">PCF [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PcfMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pcf.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PcfMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PCF</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OffsettingAssetsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Assets [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned, Balance, Principal Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total par amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BLIBuyerIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">BLI Buyer, Inc. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BLIBuyerIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BLI Buyer, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BLIBuyerIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BLI Buyer, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PsychiatricMedicalCareLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Psychiatric Medical Care LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PsychiatricMedicalCareLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Psychiatric Medical Care LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PsychiatricMedicalCareLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Psychiatric Medical Care LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIdentifierAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Identifier [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DerivativeInstrumentAverageNotionalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of average notional value of contracts during period of derivative contract.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DerivativeInstrumentAverageNotionalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Instrument, Average Notional Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DerivativeInstrumentAverageNotionalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Average notional amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Statement [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RocSkincareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">RoC Skincare [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RocSkincareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">RoC Skincare</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RocSkincareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">RoC Skincare [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReceivableInvestmentSale_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Receivable for investments sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReceivableInvestmentSale_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Receivable, Investment, Sale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ReceivableInvestmentSale_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Receivable for sales and paydowns of investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warrants</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WarrantMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warrant [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFilerCategory_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Filer Category</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Third December Two Thousand Twenty Four One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty third december two thousand twenty four one.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">December 23, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BCCCPKInvestments2LPEquityInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">BCC CPK Investments 2, LP Equity Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BCCCPKInvestments2LPEquityInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BCC CPK Investments 2, LP Equity Interest.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BCCCPKInvestments2LPEquityInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BCC CPK Investments 2, LP Equity Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RevolverCommitmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to revolver commitment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RevolverCommitmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revolver</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SpotlessBrandsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Spotless Brands, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SpotlessBrandsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Spotless brands, Llc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SpotlessBrandsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Spotless Brands, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities and Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Liabilities and Total Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total liabilities and members' equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total Liabilities and Total Net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net amount of assets or (liabilities) presented on the consolidated statements of assets and liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Asset, Subject to Master Netting Arrangement, before Offset of Collateral</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net amount of assets or (liabilities) presented on the consolidated statements of assets and liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesByIndustryAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Industry Sector [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CashEquivalentsInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Equivalents Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CashEquivalentsInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest rate on cash equivalents.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SummaryOfInvestmentHoldingsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of Investment Holdings [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SummaryOfInvestmentHoldingsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TrancheBNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tranche B Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TrancheBNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tranche B Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TrancheBNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranche B Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySevenJuneTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Seven June Two Thousand And Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySevenJuneTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty seven june two thousand and twenty four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySevenJuneTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">June 27, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Fair Value of Debt Obligations if Carried at Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, by Balance Sheet Grouping [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">June 25, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Five June Two Thousand And Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty five june two thousand and twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FacilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Facilities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FacilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Facilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TransportationCargoSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transportation Cargo</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TransportationCargoSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transportation cargo sector.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TransportationCargoSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transportation Cargo</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TransportationCargoSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Transportation: Cargo</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Third Party Oversight and Identification Processes [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_QuarterlyFinancialInformationDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Quarterly Financial Information Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyVoluntaryFeeWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fee waiver</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyVoluntaryFeeWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Voluntary Fee Waived</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyVoluntaryFeeWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Investment Company, Voluntary Fee Waived, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyVoluntaryFeeWaived_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Incentive fee waiver</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AllbridgeLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Allbridge, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AllbridgeLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Allbridge, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AllbridgeLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allbridge, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ShareRepurchaseProgramTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementThirdPartyEngagedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Third Party Engaged [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReimbursementEligibilityExpirationDateJanuaryThirtyOneThousandTwentySevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reimbursement Eligibility Expiration Date January Thirty One Thousand Twenty Seven [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReimbursementEligibilityExpirationDateJanuaryThirtyOneThousandTwentySevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reimbursement Eligibility Expiration Date January Thirty One Thousand Twenty Seven.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssetNotionalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Asset, Notional Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssetNotionalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Currency Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssetNotionalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Notional Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_SegmentGeographicalDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WellsFargoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Wells Fargo</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WellsFargoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Wells Fargo [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WellsFargoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to Wells Fargo.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash, Restricted Cash, and Cash Equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents, Restricted Cash and Cash Equivalents, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NetAssetCommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Asset, Common Stock Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NetAssetCommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Net asset, common stock value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NetAssetCommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Shares outstanding ($0.01 par value, unlimited shares authorized)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NetAssetCommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Common Shares, $0.01 par value (29,429,825 and 13,988,959 shares issued and outstanding, respectively)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentOfAssetCoverage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Ratio of borrowings to assets, expressed as percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentOfAssetCoverage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percent of Asset Coverage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentOfAssetCoverage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Asset coverage ratio (as a percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CommonClassIMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Classification of common stock representing ownership interest in a corporation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CommonClassIMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Class I [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CommonClassIMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Class I</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WarehousingTransactionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">No definition available.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WarehousingTransactionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Warehousing Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Issuance Costs, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Issuance Costs, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Unamortized debt issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Unamortized debt issuance cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredFinanceCostsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred financing costs (net of accumulated amortization of $2,537 and $718, respectively)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentMaturityDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maturity Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyFourFebruaryTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Four February Two Thousand And Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyFourFebruaryTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty four february two thousand and twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyFourFebruaryTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">February 24, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssetFairValueGrossLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized Depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssetFairValueGrossLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Asset, Subject to Master Netting Arrangement, Liability Offset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Related Party</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Distributions reinvested</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, Dividend Reinvestment Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Variable Interest Rate, Type [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Significant Accounting Policies [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of Significant Accounting Policies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FiestaHoldingsLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fiesta Holdings, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FiestaHoldingsLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fiesta Holdings, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FiestaHoldingsLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fiesta Holdings, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash Equivalent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Restricted Cash Equivalents, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MasterConcessionAirMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Master ConcessionAir</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MasterConcessionAirMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Master ConcessionAir [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MasterConcessionAirMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Master concessionair.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GaapIncentiveFeeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">GAAP incentive fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GaapIncentiveFeeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">GAAP Incentive Fee [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GaapIncentiveFeeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to GAAP incentive fees.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ShareRepurchaseProgramAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WSHPCottonwoodBuyerLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">WSHP Cottonwood Buyer, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WSHPCottonwoodBuyerLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">WSHP Cottonwood Buyer, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WSHPCottonwoodBuyerLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">WSHP Cottonwood Buyer, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate Floor Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Rate Floor Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest rate floor Three.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management, Strategy, and Governance [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Interests</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PrecisionConceptsParentIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Precision Concepts Parent Inc. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PrecisionConceptsParentIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Precision Concepts Parent Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PrecisionConceptsParentIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Precision Concepts Parent Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Other Receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInOtherReceivables_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Other receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionOrdinaryIncome_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Distributions from distributable earnings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionOrdinaryIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Distribution, Ordinary Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionOrdinaryIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ordinary Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentUnaffiliatedIssuerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Non Controlled/Non Affiliate Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentUnaffiliatedIssuerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Unaffiliated Issuer [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DividendsPayableCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividend payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DividendsPayableCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basic increase in net assets resulting from operations per common share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Basic increase (decrease) in net assets resulting from operations per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInManagementFeePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Base management fee payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInManagementFeePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Management Fee Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repayments of Long-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Repayments of Long-Term Debt, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepaymentsOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repayments of debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedInvestmentGainsLossesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Realized and Unrealized Gains (Losses)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedInvestmentGainsLossesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Realized Investment Gains (Losses) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedInvestmentGainsLossesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net realized and unrealized gains</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SONIAPlusSixPointFourTwoPercentageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SONIA + 6.42%</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SONIAPlusSixPointFourTwoPercentageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SONIA Plus Six Point Four Two Percentage [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SONIAPlusSixPointFourTwoPercentageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">SONIA plus six point four two percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTotalReturn_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total return</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTotalReturn_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Total Return</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Adjustment to Reconcile Net Income to Cash Provided by (Used in) Operating Activity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Adjustments to reconcile net increase (decrease) in net assets from operations to net cash provided by (used in) operating activities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_HedgingDesignationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hedging Designation [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Incentive fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fee expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Incentive Fee Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GalanthusGroupHoldingsLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Galanthus Group Holdings, Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GalanthusGroupHoldingsLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Galanthus Group Holdings, Limited.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GalanthusGroupHoldingsLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Galanthus Group Holdings, Limited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DelayedDrawCommitment1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Delayed Draw Commitment1 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DelayedDrawCommitment1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to delayed draw commitment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DelayedDrawCommitment1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Delayed Draw 1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseRatioBeforeIncentiveAllocation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Expense Ratio before Incentive Allocation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseRatioBeforeIncentiveAllocation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total operating expenses to average net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TelecommunicationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Telecommunications</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TelecommunicationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Telecommunications [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TelecommunicationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Telecommunications Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subordinated Note Investment Vehicles Basis Spread Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Basis spread variable rate in subordinated note investment vehicles.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EngineeredProductsCoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Engineered Products Co., LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EngineeredProductsCoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Engineered Products Co., LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EngineeredProductsCoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Engineered Products Co., LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingAfterTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Realized Gain (Loss), Investment and Derivative, Operating, after Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingAfterTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net realized gains</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Tax Basis, Unrealized Gain</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross unrealized appreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ShareRepurchaseProgramDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForestProductsAndPaperSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forest Products And Paper Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForestProductsAndPaperSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Forest products and paper sector.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForestProductsAndPaperSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forest Products &amp; Paper</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EXTAcquisitionsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EXT Acquisitions, Inc. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EXTAcquisitionsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">EXT Acquisitions, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EXTAcquisitionsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">EXT Acquisitions, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorSixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Rate Floor Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorSixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest rate floor six.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorSixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate Floor Six</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DividendReinvestmentPlanPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dividend Reinvestment Plan [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DividendReinvestmentPlanPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for Dividend Reinvestment Plan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DividendReinvestmentPlanPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividend Reinvestment Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bain Capital Senior Loan Program II, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to Bain Capital Senior Loan Program II, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bain Capital Senior Loan Program II, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Reconciliation of Beginning and Ending Balances for Investments That Use Level 3 Inputs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntitySmallBusiness_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Small Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TrusteeFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Trustee Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TrusteeFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trustee fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unused facility fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeeAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Commitment Fee Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_HedgingDesignationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hedging Designation [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SikichMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sikich [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SikichMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sikich [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SikichMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sikich</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AOMInfusionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AOM Infusion [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AOMInfusionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">AOM Infusion.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AOMInfusionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">AOM Infusion</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retained Earnings (Accumulated Deficit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Retained Earnings (Accumulated Deficit), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accumulated distributable earnings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AsprPacAcquisitionCoLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ASP-r-pac Acquisition Co LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AsprPacAcquisitionCoLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ASP-r-pac Acquisition CoLLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AsprPacAcquisitionCoLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to ASP-r-pac Acquisition Co LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VitalPurchaserLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vital Purchaser, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VitalPurchaserLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Vital purchaser Llc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VitalPurchaserLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vital Purchaser, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCommitmentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Commitments [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_G702BuyerIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">G702 Buyer, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_G702BuyerIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">G702 Buyer, Inc. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_G702BuyerIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">G702 Buyer, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesIndustryMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Industry Sector [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Preferred Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PreferredStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityWellKnownSeasonedIssuer_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Well-known Seasoned Issuer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineFebruaryTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Nine February Two Thousand And Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineFebruaryTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty Nine February Two Thousand And Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineFebruaryTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">February 29, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ManagementFeeExpenseVoluntarilyWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of management fee expense voluntarily waived during the period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ManagementFeeExpenseVoluntarilyWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Management Fee Expense, Voluntarily Waived</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ManagementFeeExpenseVoluntarilyWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Management fees voluntarily waived</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfMinimumUtilizationThreshold_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The percentage of minimum utilization threshold.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfMinimumUtilizationThreshold_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Minimum Utilization Threshold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfMinimumUtilizationThreshold_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of minimum utilization threshold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MeasurementInputRecoveryRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Measurement input using recovery rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MeasurementInputRecoveryRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Recovery Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MeasurementInputRecoveryRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recovery Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subordinated Note Investment Vehicles</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to subordinated note in investment vehicles.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subordinated Note in Investment Vehicles [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Subordinated Notes in Investment Vehicles</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization, Consolidation and Presentation of Financial Statements [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedAmortizationDeferredFinanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred financing costs accumulated amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedAmortizationDeferredFinanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accumulated Amortization, Debt Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccumulatedAmortizationDeferredFinanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accumulated amortization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_UtilitiesElectricMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Utilities: Electric</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_UtilitiesElectricMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Utilities Electric [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_UtilitiesElectricMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Utilities electric.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDividends_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Dividends</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDividends_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Payments of Dividends, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfDividends_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Shareholder distributions paid</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorSevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Rate Floor Seven [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorSevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest rate floor seven.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorSevenMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate Floor Seven</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfDeferredCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of deferred offering costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfDeferredCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortization of Deferred Charges</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfDeferredCharges_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Amortization of Deferred Charges, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net amounts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Asset, Including Not Subject to Master Netting Arrangement, after Offset and Deduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonClassAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Class A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonClassAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class A Common Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AmendmentFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amendment Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VasaFitnessLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vasa Fitness, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VasaFitnessLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vasa Fitness, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VasaFitnessLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Vasa Fitness, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CityBbqMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City BBQ [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CityBbqMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">City BBQ.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CityBbqMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City BBQ</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_KAMCHoldingsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">KAMC Holdings, Inc. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_KAMCHoldingsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">KAMC Holdings, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_KAMCHoldingsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">KAMC Holdings, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concentration Risk [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressPostalZipCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Postal Zip Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Cash Used in Operating Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net cash used in operating activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BeverageFoodandTobaccoSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Beverage Food and Tobacco. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BeverageFoodandTobaccoSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Beverage Food and Tobacco</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BeverageFoodandTobaccoSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Beverage Foodand Tobacco Sector Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ICATLogisticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ICAT Logistics, Inc. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ICATLogisticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">ICAT Logistics, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ICATLogisticsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ICAT Logistics, Inc</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskRoleOfManagementTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Role of Management [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RisksRelatingToCommonSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Risks Relating to Common Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RisksRelatingToCommonSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Risks relating to common shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EighteenJulyTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Eighteen July Two Thousand And Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EighteenJulyTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Eighteen july two thousand and twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EighteenJulyTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">July 18, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Derivative Instruments in Statement of Financial Position, Fair Value [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Offset of Assets and Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Six September Two Thousand And Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty six september two thousand and twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">September 26, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accretion of discounts and amortization of premiums</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortization of Debt Discount (Premium)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Accretion of discounts and amortization of premiums</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CashAndCashEquivalentsHeldInForeignCurrency_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents Held in Foreign Currency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CashAndCashEquivalentsHeldInForeignCurrency_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of cash and cash equivalents held in foreign currency.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CashAndCashEquivalentsHeldInForeignCurrency_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SeventeenMarchTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Seventeen March Two Thousand And Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SeventeenMarchTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Seventeen march two thousand and twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SeventeenMarchTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">March 17, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PureWaferMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pure wafer.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PureWaferMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pure Wafer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PureWaferMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pure Wafer [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate, Effective Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effective interest rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Address Line One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Per share data:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShareAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Investment Income (Loss) from Operations, Per Share [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Supplemental Disclosure of Cash Flow Information and Non-Cash Activities:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Supplemental Cash Flow Information [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign Currency Translation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foreign Currency Transactions and Translations Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized appreciation on forward currency exchange contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Derivative Asset, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Unrealized appreciation on forward currency exchange contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OrganizationExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for organizational expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OrganizationExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization Expenses [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OrganizationExpensesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIssuerNameExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Issuer Name [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConstructionAndBuildingSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Construction &amp; Building</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConstructionAndBuildingSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Construction and Building Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConstructionAndBuildingSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Construction and Building Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BalanceSheetLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position Location, Balance [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ManagementFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Base management fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ManagementFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Management fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ManagementFeeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Management Fee Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SixteenOctoberTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">October 16, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SixteenOctoberTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sixteen October Two Thousand And Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SixteenOctoberTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sixteen october two thousand and twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BeaconSpecializedLivingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Beacon Specialized Living [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BeaconSpecializedLivingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Beacon specialized living.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BeaconSpecializedLivingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beacon Specialized Living</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BlackbirdPurchaserIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Blackbird Purchaser, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BlackbirdPurchaserIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Blackbird Purchaser Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BlackbirdPurchaserIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Blackbird Purchaser Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Board Committee or Subcommittee Responsible for Oversight [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySixNovemberTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Six November Two Thousand And Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySixNovemberTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty six november two thousand and twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySixNovemberTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">November 26, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputComparabilityAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Comparative Yields</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputComparabilityAdjustmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Comparability Adjustment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DtiqTechnologiesIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">DTIQ Technologies, Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DtiqTechnologiesIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Dtiq technologies Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DtiqTechnologiesIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">DTIQ Technologies, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentType_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Type</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash paid for excise taxes during the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Taxes Paid, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxesPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Income Taxes Paid, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TransportationCargoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Transportation: Cargo</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TransportationCargoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Transportation Cargo [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TransportationCargoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Transportation Cargo Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TransportationCargoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Transportation: Cargo</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TypeOfArrangementAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net increase (decrease), shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Period Increase (Decrease)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net increase (decrease)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChemicalsPlasticsAndRubberMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Chemicals, Plastics and Rubber [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChemicalsPlasticsAndRubberMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Chemicals, Plastics, &amp; Rubber</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChemicalsPlasticsAndRubberMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related chemicals, plastics and rubber.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Collaborative Arrangement and Arrangement Other than Collaborative [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCentralIndexKey_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Central Index Key</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInvestmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Investment Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInvestmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInvestmentExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Process for Informing Board Committee or Subcommittee Responsible for Oversight [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossRealized_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Realized Gain (Loss), Foreign Currency Transaction, before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossRealized_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net realized gain on forward currency exchange contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossRealized_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net realized gain on foreign currency transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossRealized_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net realized gain on foreign currency transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Approach and Technique [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">December 23, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Third December Two Thousand Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty third december two thousand twenty four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Increase (Decrease) in Cash, Foreign Cash, Restricted Cash and Cash Equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Period Increase (Decrease), Excluding Exchange Rate Effect, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net increase in cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeOperating_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total interest income from non-controlled/non-affiliate investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeOperating_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income, Operating</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeOperating_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total interest income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_StockRepurchaseProgramHoldingPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchase Program, Holding Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_StockRepurchaseProgramHoldingPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock repurchase program, holding period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_StockRepurchaseProgramHoldingPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Holding period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">JPM Revolving Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">JPM Revolving credit facility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">JPM Revolving Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common shares, par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Par or Stated Value Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Par value per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ZeusFireSecurityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Zeus Fire &amp; Security [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ZeusFireSecurityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Zeus fire &amp; security.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ZeusFireSecurityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Zeus Fire &amp; Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineMarchTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Nine March Two Thousand And Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineMarchTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty Nine March Two Thousand And Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineMarchTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">March 29, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LiabilitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfInvestmentByIndustryTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Investment by Industry</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfInvestmentByIndustryTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of investment by industry.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfInvestmentByIndustryTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Investment by Industry [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdministrativeFeesExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Administrative Fees Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdministrativeFeesExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expense incurred</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FourthAmendedAndRestatedDeclarationOfTrustTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fourth Amended and Restated Declaration of Trust Term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FourthAmendedAndRestatedDeclarationOfTrustTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fourth amended and restated declaration of trust term.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FourthAmendedAndRestatedDeclarationOfTrustTerm_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fourth amended and restated declaration of trust term</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfUnrealizedAppreciationAndDepreciationOnInvestmentsForTaxPurposeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of unrealized appreciation and depreciation on investments for tax purpose.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfUnrealizedAppreciationAndDepreciationOnInvestmentsForTaxPurposeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Unrealized Appreciation And Depreciation On Investments For Tax Purpose [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfUnrealizedAppreciationAndDepreciationOnInvestmentsForTaxPurposeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Aggregate Unrealized Appreciation and Depreciation on Investments and Forward Currency Exchange Contracts Based on Cost for U.S. Federal Income Tax Purpose</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeeExpenseIncomeBased_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fee on income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeeExpenseIncomeBased_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee Expense, Income-Based</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyExpenseRecoupmentSupport_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Expense Recoupment Support</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyExpenseRecoupmentSupport_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment company, expense recoupment (support).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyExpenseRecoupmentSupport_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Expense recoupment (support)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyExpenseRecoupmentSupport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fee waiver</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BridgerAerospaceGroupHoldingsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bridger Aerospace Group Holdings, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BridgerAerospaceGroupHoldingsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bridger Aerospace Group Holdings, Inc. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BridgerAerospaceGroupHoldingsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Bridger Aerospace Group Holdings, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreferredEquityInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Equity Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreferredEquityInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Preferred equity interest rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputEbitdaMultipleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, EBITDA Multiple [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputEbitdaMultipleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue Multiple</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputEbitdaMultipleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">EBITDA Multiple</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Expenses, Net of Fee Waivers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Expense, after Reduction of Fee Waiver and Reimbursement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fee waiver</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedInvestmentGainsLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net realized gain (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedInvestmentGainsLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Realized Investment Gains (Losses)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedInvestmentGainsLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Realized Investment Gains (Losses), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedInvestmentGainsLosses_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net realized gain (loss) on non-controlled/non-affiliate investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedInvestmentGainsLosses_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net realized (gain) loss from investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeOperatingPaidInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest from investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeOperatingPaidInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income, Operating, Paid in Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFinStmtErrorCorrectionFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Financial Statement Error Correction [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturingInYearsTwoAndThree_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">1-3 years</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturingInYearsTwoAndThree_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturity, Year Two and Three</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturingInYearsTwoAndThree_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Long-Term Debt, Maturity, Year Two and Three, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_DE_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Germany</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_DE_lbl" xlink:role="http://www.xbrl.org/2003/role/label">GERMANY</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Blackrock Liquidity Funds T Fund Institutional Share Class</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Blackrock Liquidity Funds T Fund Institutional Share Class [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Blackrock liquidity funds t fund institutional share class.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net change in unrealized appreciation on foreign currency translation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrealized Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Unrealized Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, before Tax, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Increase (Decrease) from Capital Share Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Capital Share Transaction, Increase (Decrease)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Increase from Capital Share Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_JhccHoldingsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to JHCC Holdings, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_JhccHoldingsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Jhcc Holdings, Llc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_JhccHoldingsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">JHCC Holdings, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FiveLargestInvesteeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Five Largest Investee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FiveLargestInvesteeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the five investee the entity has invested its assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FiveLargestInvesteeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Five Largest Investee [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchases of investments and other adjustments to cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Purchases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConsumerGoodsDurableSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consumer Goods Durable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConsumerGoodsDurableSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Consumer Goods Durable Sector Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConsumerGoodsDurableSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consumer Goods : Durable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross Additions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments in and Advances to Affiliates, at Fair Value, Gross Additions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gross additions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class I:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Capital Share Transactions, Stock Issued [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_HedgeFundsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hedge Funds [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_HedgeFundsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hedged items</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_IL_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Israel</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_IL_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ISRAEL</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CurrentFiscalYearEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Current Fiscal Year End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Long-Term Debt Instruments [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PrepaidInsurancePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for prepaid insurance.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PrepaidInsurancePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Insurance [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PrepaidInsurancePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid Insurance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EquityInterestInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Interest Investment Vehicles</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EquityInterestInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to equity interest in investment vehicles.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EquityInterestInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Interest in Investment Vehicles [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EquityInterestInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Equity Interests Investment Vehicles</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PrepaidFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid financing costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PrepaidFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Financing Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PrepaidFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Prepaid financing costs.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Preferred Equity Investment Interest Rate Paid In Kind</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Preferred equity investment interest rate paid in kind.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PIK</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentQuarterlyReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Quarterly Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ManagementFeeExpenseContractuallyWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of management fee expense contractually waived during the period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ManagementFeeExpenseContractuallyWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Management Fee Expense, Contractually Waived</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ManagementFeeExpenseContractuallyWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Management fees contractually waived</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeCollateralRightToReclaimCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collateral on derivatives</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeCollateralRightToReclaimCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liability, Subject to Master Netting Arrangement, Collateral, Right to Reclaim Cash Not Offset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goldman Sachs Financial Square Government Fund Institutional Share Class [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Goldman Sachs Financial Square Government Fund Institutional Share Class.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goldman Sachs Financial Square Government Fund Institutional Share Class</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_NZ_lbl" xlink:role="http://www.xbrl.org/2003/role/label">NEW ZEALAND</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_NZ_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New Zealand</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DebtInstrumentInterestRateSwaps_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Interest Rate Swaps</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DebtInstrumentInterestRateSwaps_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument, interest rate swaps.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DebtInstrumentInterestRateSwaps_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate Swaps</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressStateOrProvince_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address State or Province</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Distributions payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Distribution Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Distributions payable to Members</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ratio of net investment income to average net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Investment Income (Loss) Ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WPEFIXBidco23BVFkaKeystoneBidcoBVMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">WPEF IX Bidco 23 B.V. (Fka Keystone Bidco B.V.) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WPEFIXBidco23BVFkaKeystoneBidcoBVMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">WPEF IX Bidco 23 B.V. (Fka Keystone Bidco B.V.) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WPEFIXBidco23BVFkaKeystoneBidcoBVMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">WPEF IX Bidco 23 B.V. (Fka Keystone Bidco B.V.)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DelayedDrawCommitment2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Delayed Draw Commitment2 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DelayedDrawCommitment2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Delayed draw commitment2</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DelayedDrawCommitment2Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Delayed Draw 2</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OrionMidcoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Orion Midco, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OrionMidcoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Orion Midco, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OrionMidcoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Orion Midco, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PBIGroupLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">PBIGroup, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PBIGroupLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">PBIGroup, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PBIGroupLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PBIGroup, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_EquityMethodInvesteeNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedBalanceShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned, Balance, Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedBalanceShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementGeographicalAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Geographical [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetInvestmentIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetInvestmentIncomeAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Investment Income [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubscriptionsReceivedInAdvancePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subscriptions Received in Advance [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubscriptionsReceivedInAdvancePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for subscriptions received in advance.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubscriptionsReceivedInAdvancePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subscriptions Received in Advance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Interest receivable on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accrued Interest Receivable, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other General and Administrative Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherGeneralAndAdministrativeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other general and administrative expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AerospaceAndDefenseSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to aerospace and defense sector.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AerospaceAndDefenseSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aerospace &amp; Defense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AerospaceAndDefenseSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aerospace &amp; Defense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AegVisionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">AEG Vision</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AegVisionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AEG Vision [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AegVisionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Aeg vision.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RydooMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Rydoo [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RydooMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Rydoo [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RydooMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Rydoo</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HeliosServicePartnersLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Helios Service Partners, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HeliosServicePartnersLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Helios Service Partners, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HeliosServicePartnersLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Helios Service Partners, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AeriTekGlobalCADAcquisitionIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AeriTek Global CAD Acquisition Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AeriTekGlobalCADAcquisitionIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">AeriTek Global CAD Acquisition Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AeriTekGlobalCADAcquisitionIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">AeriTek Global CAD Acquisition Inc</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The percentage of total portfolio at amortized cost.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Percent Of Portfolio Amortized Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of Total Portfolio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCEquityInterestInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bain Capital Senior Loan Program II</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCEquityInterestInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bain Capital Senior Loan Program II, LLC Equity Interest Investment Vehicles [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCEquityInterestInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Bain capital senior loan program II LLC equity interest investment vehicles.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ValuationOfOtherFinancialAssetsAndFinancialLiabilitiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Valuation of Other Financial Assets and Financial Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ValuationOfOtherFinancialAssetsAndFinancialLiabilitiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation of Other Financial Assets and Financial Liabilities [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ValuationOfOtherFinancialAssetsAndFinancialLiabilitiesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Valuation of other financial assets and financial liabilities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Event</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RisksRelatingToOurBusinessAndStructureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Risks Relating to Our Business and Structure [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RisksRelatingToOurBusinessAndStructureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Risks relating to our business and structure.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Incentive Fee Payable, Income-Based</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fee payable on income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Expenses Before Fee Waivers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Expense, Before Fee Waiver and Reimbursement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment company, expense, before fee waiver and reimbursement.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySevenAugustTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Seven August Two Thousand And Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySevenAugustTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty seven august two thousand and twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySevenAugustTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">August 27, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyDistributableEarningsLossAccumulatedShortTermCapitalLossCarryforward_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company Distributable Earnings Loss Accumulated Short Term Capital Loss Carryforward</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyDistributableEarningsLossAccumulatedShortTermCapitalLossCarryforward_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment company distributable earnings loss accumulated short term capital loss carryforward.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyDistributableEarningsLossAccumulatedShortTermCapitalLossCarryforward_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Short-term capital loss carryforward</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Threshold asset coverage ratio (as a percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Senior Security, Indebtedness, Asset Coverage Ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The percentage of shareholder servicing and/or distribution fee of aggregate NAV.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Shareholder Servicing and or Distribution Fee of Aggregate NAV</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of shareholder servicing and/or distribution fee of aggregate NAV</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NewMilaniGroupLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New Milani Group LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NewMilaniGroupLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">New Milani Group LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NewMilaniGroupLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">New Milani Group LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LagerboxMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lagerbox.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LagerboxMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lagerbox [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LagerboxMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lagerbox</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentInterestRatePaidInKind_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Interest Rate, Paid in Kind</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentInterestRatePaidInKind_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Interest Rate, Paid in Kind</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The incentive fee on capital gains as a percent of realized capital gains.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee on Capital Gains As Percent Of Realized Capital Gains on Cumulative Basis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fee on capital gains (in percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Borrowing interest expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpenseDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Interest Expense, Debt, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfCarryingValuesOfDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of carrying value of debt.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfCarryingValuesOfDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Carrying Values of Debt [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfCarryingValuesOfDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Components of Carrying Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital Share Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Capital Share Transaction, Increase (Decrease) [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ShareRedemptionPriceUsedPercentOfMostRecentlyDisclosedNetAssetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Redemption Price Used Percent of Most Recently Disclosed Net Asset Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ShareRedemptionPriceUsedPercentOfMostRecentlyDisclosedNetAssetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Share redemption price used percent of most recently disclosed net asset value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ShareRedemptionPriceUsedPercentOfMostRecentlyDisclosedNetAssetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percent of most recently disclosed net asset value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilityNotionalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liability, Notional Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilityNotionalAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Currency Purchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Unamortized Discount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Instrument, Unamortized Discount, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt (net of unamortized debt issuance)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NumberOfFacilityAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of facility agreements.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NumberOfFacilityAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number Of Facility Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NumberOfFacilityAgreements_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of facility agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_NameOfMajorCustomerDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized depreciation on forward currency exchange contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Unrealized depreciation on forward currency exchange contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Forward currency exchange contracts (liability)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liability</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Derivative Liability, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PeriodOfTerminationByNotice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The period of termination by notice by either of the parties, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PeriodOfTerminationByNotice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Period of Termination by Notice</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PeriodOfTerminationByNotice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Termination period by notice</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DebtInvestmentAmountOfUnfundedRevolversDelayedDrawposition_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Investment Amount of Unfunded Revolvers Delayed DrawPosition</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DebtInvestmentAmountOfUnfundedRevolversDelayedDrawposition_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt investment amount of unfunded revolvers delayed draw position.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DebtInvestmentAmountOfUnfundedRevolversDelayedDrawposition_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt investment amount of unfunded revolvers delayed draw position</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GsRevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">GS Revolving Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GsRevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">GS Revolving Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GsRevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">GS revolving credit facility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_BE_lbl" xlink:role="http://www.xbrl.org/2003/role/label">BELGIUM</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_BE_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Belgium</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate Floor One</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Rate Floor One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest rate floor one.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RisksRelatingToTheNinteenFourtyActMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Risks Relating to the Ninteen Fourty Act [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RisksRelatingToTheNinteenFourtyActMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Risks relating to the ninteen fourty act.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RisksRelatingToTheNinteenFourtyActMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Risks Relating to the 1940 Act [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCommitmentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Commitments [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherCommitmentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Commitments [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Rate Floor Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest rate floor five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate Floor Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_R1RCMIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">R1 RCM Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_R1RCMIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">R1 RCM Inc. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_R1RCMIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">R1 RCM Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AutomotiveSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Automotive</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AutomotiveSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Automotive Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ClassSSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Class S Shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ClassSSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class S Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ClassSSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class S shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RelatedPartyTransactionShareholderServicingAndDistributionFeesPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shareholder servicing and/or distribution fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RelatedPartyTransactionShareholderServicingAndDistributionFeesPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction Shareholder Servicing and Distribution Fees Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RelatedPartyTransactionShareholderServicingAndDistributionFeesPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Related party transaction shareholder servicing and distribution fees percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SimplicityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Simplicity [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SimplicityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Simplicity.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SimplicityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Simplicity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FireFinanceSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related fire finance.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FireFinanceSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fire Finance Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FireFinanceSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fire Finance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FireFinanceSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">FIRE: Finance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyFifthOctoberTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Fifth October Two Thousand Twenty four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyFifthOctoberTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty Fifth October Two Thousand Twenty four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyFifthOctoberTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">October 25, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ThirtyOneJanuaryTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Thirty One January Two Thousand And Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ThirtyOneJanuaryTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Thirty One January Two Thousand And Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ThirtyOneJanuaryTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">January 31, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AerospaceSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aerospace Sector</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AerospaceSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aerospace Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AerospaceSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Aerospace &amp; Defense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Borrowing Base is Less Than 1.60 Times</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MinimumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FinancialInstrumentAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instrument [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amount of assets on the consolidated statements of assets and liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Asset, Subject to Master Netting Arrangement, before Offset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Six September Two Thousand And Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty six september two thousand and twenty four member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">September 26, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductions_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross Reductions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductions_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments in and Advances to Affiliates, at Fair Value, Gross Reductions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductions_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gross Reductions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyIncentiveFeeToAverageNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Ratio of incentive fees and management fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyIncentiveFeeToAverageNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ratio of incentive fees and management fees, net of contractual and voluntary waivers, to average net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyIncentiveFeeToAverageNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Incentive Fee to Average Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ClassISharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Class I Shares Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ClassISharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class I Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ClassISharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class I Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DebtInstrumentEffectiveInterestRateSwapHedge_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument Effective Interest Rate Swap Hedge</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DebtInstrumentEffectiveInterestRateSwapHedge_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Debt instrument effective interest rate swap hedge.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DebtInstrumentEffectiveInterestRateSwapHedge_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effective interest rate swap hedge</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_QuarterlyFinancialInformationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Quarterly Financial Information [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_QuarterlyFinancialInformationTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Selected Quarterly Financial Data (unaudited)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashHeldInForeignCurrency_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Foreign cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashHeldInForeignCurrency_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalent, Held in Foreign Currency</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashHeldInForeignCurrency_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign cash (cost of $5,912 and $1,006, respectively)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 3</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel3Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 3 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ShareRepurchaseProgramLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net unrealized and realized gains (losses)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net realized and unrealized gain (loss) per share - basic and diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Gain (Loss) on Investment, Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChiltonMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Chilton [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChiltonMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Chilton.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChiltonMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Chilton</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to pre-incentive fee net investment income exceeds catch up amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre Incentive Fee Net Investment Income Exceeds Catch Up Amount [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre-incentive fee net investment income that exceeds the Catch-Up Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amended advisory agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net change in unrealized appreciation on foreign currency translation on debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrealized Gain (Loss), Investment, Derivative, and Foreign Currency Translation on Debt, Operating, Before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unrealized gain (loss), investment, derivative, and foreign currency translation on debt, operating, before tax.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossOnInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrealized Gain (Loss) on Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossOnInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in Unrealized Appreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossOnInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net change in unrealized appreciation on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCPreferredEquityInterestInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bain Capital Senior Loan Program II</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCPreferredEquityInterestInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bain Capital Senior Loan Program II, LLC Preferred Equity Interest Investment Vehicles [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCPreferredEquityInterestInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Bain capital senior loan program II LLC preferred equity interest investment vehicles.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BNPParibasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">BNP Paribas [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BNPParibasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BNP Paribas</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BNPParibasMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BNP Paribas.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_UtilitiesWaterMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Utilities Water [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_UtilitiesWaterMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Utilities water.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_UtilitiesWaterMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Utilities: Water</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineJanuaryTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Nine January Two Thousand And Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineJanuaryTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty nine january two thousand and twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineJanuaryTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">January 29, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net realized and unrealized gain (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss), Investment, Derivative, and Foreign Currency Transaction Price Change, Operating, before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Net Gains</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net realized and unrealized gain (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Shares outstanding, end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Shares, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Shares, Outstanding, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LogrhythmIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Logrhythm Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LogrhythmIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Logrhythm Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LogrhythmIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LogRhythm, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable and Accrued Liabilities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable and accrued expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash and cash equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash and Cash Equivalent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCashAndCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Restricted Cash and Cash Equivalents, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingencies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Commitments and Contingencies (See Note 10)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SolairusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Solairus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SolairusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Solairus.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SolairusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Solairus [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnMayThirtyOneTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchase Deadline Request May 31, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnMayThirtyOneTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repurchase Request Deadline on May Thirty One Two Thousand Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnMayThirtyOneTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Repurchase request deadline on may thirty one two thousand twenty four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_StockRepurchasedDuringPeriodIncludingEarlyRepurchaseDeduction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchased During Period Including Early Repurchase Deduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_StockRepurchasedDuringPeriodIncludingEarlyRepurchaseDeduction_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The gross amount of stock repurchased during period before reduction of early repurchase deduction.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_StockRepurchasedDuringPeriodIncludingEarlyRepurchaseDeduction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchase of Common Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorFirmId_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Auditor Firm ID</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TrancheAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tranche A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TrancheAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tranche A.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TrancheAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranche A</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt instrument, basis spread on variable rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Basis Spread on Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Spread rate (as a percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Investment interest floor rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioForecastMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forecast [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioForecastMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forecast</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReimbursementPercentageOfOtherOperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reimbursement percentage of other operating expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReimbursementPercentageOfOtherOperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reimbursement Percentage of Other Operating Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReimbursementPercentageOfOtherOperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reimbursement percentage of other operating expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLossSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net change in unrealized appreciation on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLossSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of gain (loss) recognized in subsidiary other comprehensive income (OCI) from asset measured at fair value on recurring basis using unobservable input (level 3).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLossSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Other Comprehensive Income Loss, Subsidiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SecondLienSeniorSecuredLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to second lien senior secured loan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SecondLienSeniorSecuredLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Second Lien Senior Secured Loan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SecondLienSeniorSecuredLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Second Lien Senior Secured Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CapitalEquipmentSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CapitalEquipmentSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related capital equipment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CapitalEquipmentSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Capital Equipment</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnFebruaryTwentyNineTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repurchase Request Deadline on February Twenty Nine Two Thousand Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnFebruaryTwentyNineTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Repurchase request deadline on february twenty nine two thousand twenty four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnFebruaryTwentyNineTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchase Deadline Request February 29, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RedNucleusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Red Nucleus [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RedNucleusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Red nucleus.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RedNucleusMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Red Nucleus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_IncreaseDecreaseInPrepaidFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase Decrease In Prepaid Financing Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_IncreaseDecreaseInPrepaidFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Increase Decrease In Prepaid Financing Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_IncreaseDecreaseInPrepaidFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Prepaid financing costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Open Forward Foreign Currency Contract, Identifier [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Benchmark [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MinimumSubscriptionsForForwardObligationToPurchasePortfolioInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of minimum subscriptions for forward obligation to purchase the Portfolio Investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MinimumSubscriptionsForForwardObligationToPurchasePortfolioInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Minimum Subscriptions For Forward Obligation To Purchase The Portfolio Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MinimumSubscriptionsForForwardObligationToPurchasePortfolioInvestments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Minimum subscriptions for forward obligation to purchase Portfolio Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FirstLienSeniorSecuredLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to first lien senior secured loans.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FirstLienSeniorSecuredLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">First Lien Senior Secured Loans [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FirstLienSeniorSecuredLoansMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">First Lien Senior Secured Loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_JE_lbl" xlink:role="http://www.xbrl.org/2003/role/label">JERSEY</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_JE_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Jersey</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PharmacyPartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pharmacy Partners [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PharmacyPartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Pharmacy Partners.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PharmacyPartnersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pharmacy Partners</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AbrLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">ABR loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AbrLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ABR Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AbrLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ABR Loan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HealthcareAndPharmaceuticalsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Healthcare &amp; Pharmaceuticals</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HealthcareAndPharmaceuticalsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of the economy consisting of companies engaged in healthcare-related business activities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HealthcareAndPharmaceuticalsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Healthcare &amp; Pharmaceuticals</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ValuationTechniqueCollateralCoverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collateral Coverage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ValuationTechniqueCollateralCoverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Technique Collateral Coverage [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ValuationTechniqueCollateralCoverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Valuation Technique Collateral Coverage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiRestricted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aggregate fair value of securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquitySecuritiesFvNiRestricted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Securities, FV-NI, Restricted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate Floor Nine</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Rate Floor Nine [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorNineMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest rate floor nine</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_AU_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Australia</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_AU_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AUSTRALIA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Income (Loss), Including Portion Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net increase (decrease) from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net increase in net assets resulting from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProfitLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net increase in members' equity resulting from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DelayedDrawCommitmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to delayed draw commitment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DelayedDrawCommitmentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Delayed Draw</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ClassDSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Class D Shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ClassDSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class D Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ClassDSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class D shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MaximumEstimatedManagingDealerFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Maximum estimated managing dealer fee.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MaximumEstimatedManagingDealerFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Estimated Managing Dealer Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MaximumEstimatedManagingDealerFee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum estimated managing dealer fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DividerAmountToDetermineFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The divider amount to determine fees.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DividerAmountToDetermineFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Divider Amount To Determine Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DividerAmountToDetermineFee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Divider amount to determine fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LogrhythmMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LogRhythm</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LogrhythmMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">LogRhythm [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LogrhythmMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">LogRhythm.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of subsidiary unrealized gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3) and still held.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Assets Measured On Recurring Basis Change In Unrealized Gain Loss, Subsidiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Change in unrealized appreciation attributable to investments still held</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Positions or Committees Responsible [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted average shares outstanding, basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average Common Shares outstanding, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Basic, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to Bain Capital Senior Loan Program, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bain Capital Senior Loan Program, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bain Capital Senior Loan Program II, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Bain Capital Senior Loan Program, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StatementScenarioAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Scenario [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AMIBuyerIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">AMI Buyer, Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AMIBuyerIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AMI Buyer, Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AMIBuyerIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">AMI Buyer, Inc</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyEightMayTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Eight May Two Thousand And Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyEightMayTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty eight may two thousand and twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyEightMayTwoThousandAndTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">May 28, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document and Entity Information</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentInterestRateFloor_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment interest floor rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentInterestRateFloor_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Interest Rate, Floor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Class I</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total Distributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Distribution Made to Limited Liability Company (LLC) Member, Cash Distributions Declared</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DtiqMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">DTIQ [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DtiqMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">DTIQ.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DtiqMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">DTiQ</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net asset value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measured at Net Asset Value Per Share [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest expense payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Interest payable on debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Process for Informing Management or Committees Responsible [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subsequent Events</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Carrying value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Long-Term Debt, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt (net of unamortized debt issuance costs of $2,901 and $0, respectively)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Agreements and Related Party Transactions Investment Advisory Agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transactions Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LEPSALCoInvestLPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LEP SAL Co-Invest, L.P.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LEPSALCoInvestLPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">LEP SAL Co Invest L P [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LEPSALCoInvestLPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">LEP SAL Co Invest L P.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MaximumFinancingCommitmentAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of maximum financing commitment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MaximumFinancingCommitmentAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum Financing Commitment Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MaximumFinancingCommitmentAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum financing commitment amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Impact of foreign currency on total net gains (losses)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Foreign Currency Derivatives Recorded in Earnings, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OghBidcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to OGH Bidco Limited.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OghBidcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">OGH Bidco Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OghBidcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">OGH Bidco Limited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Net Assets at End of Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Net Assets, beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Attributable to Parent</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Members' equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">MEMEBERS' EQUITY</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OfferingCostsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for offering costs incurred by the company.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OfferingCostsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Offering Costs Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OfferingCostsPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Offering Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfPrecedingCalendarQuarters_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of preceding calendar quarters for pre incentive fee net investment income calculation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfPrecedingCalendarQuarters_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre Incentive Fee Net Investment Income Calculation, Number Of Preceding Calendar Quarters</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfPrecedingCalendarQuarters_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of preceding calendar quarters for pre-incentive fee net investment income calculation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NafincoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Nafinco [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NafincoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Nafinco.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NafincoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Nafinco</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Components of Interest Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Income and Interest Expense Disclosure [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of Presentation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Basis of Accounting, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Stockholders' Equity [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChexFinerFoodsLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Chex Finer Foods, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChexFinerFoodsLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Chex Finer Foods, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChexFinerFoodsLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Chex Finer Foods, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WealthEnhancementGroupWegMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Wealth Enhancement Group (WEG) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WealthEnhancementGroupWegMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Wealth Enhancement Group (WEG).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WealthEnhancementGroupWegMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Wealth Enhancement Group (WEG)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Approach and Technique [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash Equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Equivalents [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentSignificantUnobservableInput_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Significant Unobservable Input [true false]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Use of Estimates, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UseOfEstimates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Use of Estimates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnAugustThirtyOneTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchase Deadline Request August 31, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnAugustThirtyOneTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repurchase Request Deadline on August Thirty One Two Thousand Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnAugustThirtyOneTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Repurchase request deadline on august thirty one two thousand twenty four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PRGXMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">PRGX [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PRGXMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">PRGX.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PRGXMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PRGX</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PayRangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">PayRange [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PayRangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Payrange.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PayRangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PayRange</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChoreoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Choreo [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChoreoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Choreo.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChoreoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Choreo</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fee payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Incentive Fee Payable, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressAddressLine2_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, Adress Line Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Measurements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosures [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DividendsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DividendsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividend receivable on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_NL_lbl" xlink:role="http://www.xbrl.org/2003/role/label">NETHERLANDS</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_NL_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Netherlands</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AlldentHoldingGmbHMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Alldent Holding GmbH</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AlldentHoldingGmbHMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Alldent Holding GmbH.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AlldentHoldingGmbHMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Alldent Holding GmbH [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Fair Value of Level 3 Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments at fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned, Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">TwoThousand Twenty Five Senior Notes, Tranche A.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheAMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">2025 Senior Notes, Tranche A [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">United States</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_US_lbl" xlink:role="http://www.xbrl.org/2003/role/label">UNITED STATES</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ACAMSMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ACAMS [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ACAMSMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">ACAMS.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ACAMSMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ACAMS</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goldman Sachs Revolving Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Goldman Sachs Revolving Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Goldman Sachs revolving credit facility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt Instrument, Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyChangesInNetAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Transactions in Common Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyChangesInNetAssetsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Change in Net Assets [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputDiscountRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Discount Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputDiscountRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Discount Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesAndOtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accrued Liabilities and Other Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccruedLiabilitiesAndOtherLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued expenses and other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReconomyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Reconomy</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReconomyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Reconomy.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReconomyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reconomy [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Instruments and Hedging Activities Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reflects concentration of investment.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Concentration Risk [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentConcentrationRiskMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Concentration Risk</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Segment Reporting, CODM, Individual Title and Position or Group Name [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Nine December Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty nine december two thousand twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">December 29, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Construction &amp; Building</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConstructionSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Construction Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest and debt financing expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Operating and Nonoperating</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Interest Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Interest expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Measurements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySecondNovemberTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty second November two thousand twenty four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySecondNovemberTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty second november two thousand twenty four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySecondNovemberTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">November 22, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Two Thousand Twenty Five Senior Notes, Tranche B.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">2025 Senior Notes, Tranche B [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment, Ownership Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ownership Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Materially Affected or Reasonably Likely to Materially Affect Registrant [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consolidated Schedule of Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Investments [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfReconciliationOfNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of reconciliation of net increase in net assets resulting from operations to taxable income.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfReconciliationOfNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Reconciliation Of Net Increase In Net Assets Resulting From Operations To Taxable Income [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfReconciliationOfNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Reconciles Net Increase in Net Assets Resulting from Operations to Taxable Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SauceCoHoldCoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SauceCo HoldCo, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SauceCoHoldCoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">SauceCo HoldCo, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SauceCoHoldCoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SauceCo HoldCo, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Expertise of Management Responsible [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment company increase in net assets from change in Income tax expenses in unrealized appreciation depreciation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company Increase In Net Assets From Change In Income Tax Expenses In Unrealized Appreciation Depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net change in unrealized appreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net change in unrealized appreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForPeriodFromTwoMonthAnniversaryOfClosingDateToThreeMonthAnniversaryOfClosingDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to the period from the two-month anniversary of the closing date to the three-month anniversary of the closing date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForPeriodFromTwoMonthAnniversaryOfClosingDateToThreeMonthAnniversaryOfClosingDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">For the Period From the Two-Month Anniversary of the Closing Date to the Three-Month Anniversary of the Closing Date [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForPeriodFromTwoMonthAnniversaryOfClosingDateToThreeMonthAnniversaryOfClosingDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">For the period from two-month anniversary of closing date to three-month anniversary of closing date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnJuneTwoTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchase Deadline Request June 2, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnJuneTwoTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repurchase Request Deadline on June Two Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnJuneTwoTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Repurchase request deadline on june two two thousand twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredChargesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred Financing Costs and Debt Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredChargesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Charges, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AllbridgeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Allbridge [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AllbridgeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Allbridge.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AllbridgeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allbridge</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AviationTechnicalServicesIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Aviation Technical Services Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AviationTechnicalServicesIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Aviation technical services Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AviationTechnicalServicesIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Aviation Technical Services, Inc</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityAverageOutstandingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Average outstanding balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityAverageOutstandingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Average Outstanding Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReimbursementEligibilityExpirationDateNovemberThirtyTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Reimbursement Eligibility Expiration Date November Thirty Two Thousand Twenty Six [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReimbursementEligibilityExpirationDateNovemberThirtyTwoThousandTwentySixMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Reimbursement eligibility expiration date November Thirty Two thousand twenty six.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Thirty November Two Thousand And Twenty Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Thirty november two thousand and twenty three.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">November 30, 2023</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityAddressCityOrTown_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Address, City or Town</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConsumerGoodsNonDurableSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consumer Goods Non Durable [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConsumerGoodsNonDurableSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Consumer Goods Non Durable Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConsumerGoodsNonDurableSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Consumer Goods: Non-durable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConsumerGoodsNonDurableSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consumer Goods: Non-Durable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_IT_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ITALY</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_IT_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Italy</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Issuer Affiliation [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Share repurchases, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchased During Period, Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Shares Repurchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total capital drawdowns, Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NonControlledAffiliateAndControlledAffiliateInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non Controlled Affiliate and Controlled Affiliate Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NonControlledAffiliateAndControlledAffiliateInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Non controlled affiliate and controlled affiliate investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NonControlledAffiliateAndControlledAffiliateInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-controlled/affiliate and controlled affiliate investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Reportable Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfReportableSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of reportable segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_SecurityExchangeName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Security Exchange Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OnOrAfterFacilitiesEndDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to on or after the Facilities End Date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OnOrAfterFacilitiesEndDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">On or After Facilities End Date [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OnOrAfterFacilitiesEndDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">On or after Facilities End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCSubordinatedNoteInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bain Capital Senior Loan Program II</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCSubordinatedNoteInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bain Capital Senior Loan Program II, LLC Subordinated Note Investment Vehicles [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCSubordinatedNoteInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Bain capital senior loan program II LLC subordinated note investment vehicles.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CreditFacilityDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Credit Facility [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdministrativeFeePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Administrative Fee Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdministrativeFeePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expenses payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total Debt Obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal amount outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Gross</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total debt obligations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Deferred Offering Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Deferred offering costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DeferredOfferingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Deferred financing costs (net of accumulated amortization of $79)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtWeightedAverageInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average interest rate of debt (as a percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtWeightedAverageInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt, Weighted Average Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfOutstandingSharesTheCompanyOfferedToRepurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Outstanding Shares the Company Offered to Repurchase</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfOutstandingSharesTheCompanyOfferedToRepurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of outstanding shares the company offered to repurchase.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfOutstandingSharesTheCompanyOfferedToRepurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of Outstanding Shares the Company Offered to Repurchase</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HlrsHoldcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">HLRS Holdco Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HlrsHoldcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Hlrs holdco limited.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HlrsHoldcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">HLRS Holdco Limited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestExpenseRelatedToHedgedItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hedged Items</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestExpenseRelatedToHedgedItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense Related To Hedged Items</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestExpenseRelatedToHedgedItems_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest expense related to hedged items.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PinnacleAcquisitionLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pinnacle Acquisition, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PinnacleAcquisitionLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pinnacle Acquisition, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PinnacleAcquisitionLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pinnacle Acquisition, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_CounterpartyNameAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnusedCommitmentsToExtendCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unfunded Commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnusedCommitmentsToExtendCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unused Commitments to Extend Credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentAcquisitionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Acquisition Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentAcquisitionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Acquisition date of the restricted securities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIssuerAffiliationExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Issuer Affiliation [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortized Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned, Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtCost_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Investments,cost basis</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtCost_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Investments, amortized cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedAtCost_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MeteorUKBidcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Meteor UK Bidco Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MeteorUKBidcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Meteor UK Bidco Limited.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MeteorUKBidcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Meteor UK Bidco Limited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LineOfCreditFacilityCurrentBorrowingCapacityRegardingProvisionToPermitIncreasesOfTermAndRevolvingCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility Current Borrowing Capacity Regarding Provision to Permit Increases of Term and Revolving Commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LineOfCreditFacilityCurrentBorrowingCapacityRegardingProvisionToPermitIncreasesOfTermAndRevolvingCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Line of credit facility, current borrowing capacity regarding provision to permit increases of term and revolving commitments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LineOfCreditFacilityCurrentBorrowingCapacityRegardingProvisionToPermitIncreasesOfTermAndRevolvingCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision to permit increases of term and revolving commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ServicesConsumerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Services: Consumer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ServicesConsumerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related services, consumer.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ServicesConsumerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Services, Consumer [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubstantialHoldcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Substantial Holdco Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubstantialHoldcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Substantial Holdco Limited.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubstantialHoldcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Substantial Holdco Limited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EarlyRepurchaseDeductionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Early repurchase deduction, value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EarlyRepurchaseDeductionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Early Repurchase Deduction, Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EarlyRepurchaseDeductionValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Early repurchase deduction, value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Cash, Foreign Cash, Restricted Cash and Cash Equivalents, End of Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total cash, foreign cash, restricted cash and cash equivalents shown in the consolidated statements of cash flows</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Cash, Foreign Cash, Restricted Cash and Cash Equivalents, Beginning of Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts Payable and Accrued Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Accounts Payable and Accrued Liabilities, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accounts payable and accrued expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Paid, Excluding Capitalized Interest, Operating Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash interest paid during the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestPaidNet_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Cash interest paid during the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FoyleBidcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foyle Bidco Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FoyleBidcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Foyle Bidco Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FoyleBidcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foyle Bidco Limited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentPeriodEndDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Period End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForPeriodFromThreeMonthAnniversaryOfClosingDateToFacilitiesEndDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to the period from the three-month anniversary of the closing date to the Facilities End Date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForPeriodFromThreeMonthAnniversaryOfClosingDateToFacilitiesEndDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">For the Period From the Three-Month Anniversary of the Closing Date to the Facilities End Date [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForPeriodFromThreeMonthAnniversaryOfClosingDateToFacilitiesEndDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">For the period from three-month anniversary of closing date to Facilities End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investments and Joint Ventures [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ManagementAndServiceFeesBaseRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Annual base management fee (in percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ManagementAndServiceFeesBaseRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Management and Service Fees, Base Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Hierarchy and NAV [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Hierarchy and NAV [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_IcfrAuditorAttestationFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ICFR Auditor Attestation Flag</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">September 26, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Six September Two Thousand And Twenty Five One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty six september two thousand and twenty five one.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CommonClassSMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Classification of common stock representing ownership interest in a corporation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CommonClassSMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Class S [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CommonClassSMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Class S</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MonarchFincoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Monarch Finco, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MonarchFincoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Monarch Finco, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MonarchFincoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Monarch Finco, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Issuer Affiliation [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EraIndustriesLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Era Industries LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EraIndustriesLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Era Industries LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EraIndustriesLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ERA Industries, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfFinancialPositionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Financial Position [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SMBC Revolving Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SMBC Revolving Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">SMBC revolving credit facility.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EasyIceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Easy Ice</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EasyIceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Easy Ice [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EasyIceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Easy Ice.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeRealizedGainLossOperatingBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Realized Gain (Loss), Debt and Equity Securities and Foreign Currency Transaction Price Change, Operating, before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeRealizedGainLossOperatingBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net realized gain on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenue [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities Transactions, Revenue Recognition and Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effective Rate of Distribution per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction, Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherReceivables_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Receivables</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_IE_lbl" xlink:role="http://www.xbrl.org/2003/role/label">IRELAND</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_IE_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ireland</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management, Strategy, and Governance [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HumicAcquisitionHoldingsLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Humic Acquisition Holdings, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HumicAcquisitionHoldingsLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Humic Acquisition Holdings, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HumicAcquisitionHoldingsLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Humic Acquisition Holdings, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Liabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentAdviceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Advice [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentAdviceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Advisor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MediaDiversifiedAndProductionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Media: Diversified &amp; Production</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MediaDiversifiedAndProductionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related to media, diversified &amp; production.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MediaDiversifiedAndProductionMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Media: Diversified &amp; Production</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financial Instruments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of unfunded commitments under loan and financing agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Fair Value, off-Balance-Sheet Risks [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SoftcoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Softco [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SoftcoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Softco.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SoftcoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SoftCo</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssetTypeExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Asset, Type [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssetTypeExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivative Asset, Type [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Excise tax expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Operating, Tax Expense (Benefit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Income taxes, including excise taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnDecemberTenTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repurchase Request Deadline on December Ten Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnDecemberTenTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Repurchase request deadline on december ten two thousand twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnDecemberTenTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchase Deadline Request December 10, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FireFinanceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fire Finance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FireFinanceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related fire finance.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FireFinanceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fire Finance [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EquityInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to equity interest.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EquityInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Interest [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EquityInterestMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Equity Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForPeriodFromClosingDateToOneMonthAnniversaryOfClosingDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to the period from the closing date to the one-month anniversary of the closing date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForPeriodFromClosingDateToOneMonthAnniversaryOfClosingDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">For the Period From the Closing Date to the One-Month Anniversary of Closing Date [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForPeriodFromClosingDateToOneMonthAnniversaryOfClosingDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">For the period from closing date to one-month anniversary of closing date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedCash_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Restricted Cash, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ClassOneSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class One Shares [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ClassOneSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class I Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ClassOneSharesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Class one shares.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignExchangeForwardMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign Exchange Forward</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignExchangeForwardMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Foreign Exchange Forward [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AccidentCareAllianceHoldcoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accident Care Alliance Holdco LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AccidentCareAllianceHoldcoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accident Care Alliance Holdco LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AccidentCareAllianceHoldcoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Accident Care Alliance Holdco LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Variable Rate [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_VariableRateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Variable Rate [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DividendIncomeOperatingPaidInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dividend Income, Operating, Paid in Cash</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DividendIncomeOperatingPaidInCash_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividend income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Weighted average shares outstanding, diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average Number of Shares Outstanding, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average Common Shares outstanding, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Weighted Average Number of Shares Outstanding, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ETechGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">E-Tech Group [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ETechGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">E-tech group.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ETechGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">E-Tech Group</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityFileNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity File Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrealized Gain (Loss), Investment and Derivative, Operating, after Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net change in unrealized appreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeeExpenseCapitalGainBased_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Incentive fee on capital gains</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeeExpenseCapitalGainBased_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee Expense, Capital-Gain-Based</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ProfessionalFeesAndOperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of professional fees and operating expenses incurred during the period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ProfessionalFeesAndOperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Professional Fees and Operating Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ProfessionalFeesAndOperatingExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Professional fees and operating expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Instruments, Gain (Loss) [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net realized and unrealized gains and losses on derivative instruments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CoverAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cover [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gross unrealized depreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Tax Basis, Unrealized Loss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeUnrealizedGainLossOperatingBeforeTax_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net change in unrealized appreciation on foreign currency translation on debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeUnrealizedGainLossOperatingBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net change in unrealized appreciation on foreign currency translation on debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeUnrealizedGainLossOperatingBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrealized Gain (Loss), Debt and Equity Securities and Foreign Currency Transaction Price Change, Operating, before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_LU_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Luxembourg</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_LU_lbl" xlink:role="http://www.xbrl.org/2003/role/label">LUXEMBOURG</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_LU_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Luxembourg</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CorePowerYogaLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">CorePower Yoga, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CorePowerYogaLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">CorePower Yoga, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CorePowerYogaLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CorePower Yoga, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NonQualifyingAssetsPercentageOfTotalAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Non-Qualifying Assets Percentage of Total Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NonQualifyingAssetsPercentageOfTotalAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of  non-qualifying assets of the total assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NonQualifyingAssetsPercentageOfTotalAsset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of non-qualifying assets of total assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDistributionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Distribution Made to Limited Liability Company (LLC) Member, Distribution Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDistributionDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payment Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubordinatedDebtMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Subordinated Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubordinatedDebtMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subordinated Debt [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubordinatedDebtMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subordinated Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnMarchThreeTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchase Deadline Request March 3, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnMarchThreeTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repurchase Request Deadline on March Three Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnMarchThreeTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Repurchase request deadline on march three two thousand twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeCategorizationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OffsettingAssetsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Offsetting Assets [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative, Gain (Loss) on Derivative, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Derivative, Gain (Loss) on Derivative, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Realized and unrealized gains and losses on interest rate swap</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VaticaHealthIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vatica Health, Inc. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VaticaHealthIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Vatica Health, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VaticaHealthIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vatica Health, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_ScenarioUnspecifiedDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Scenario [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NetAssetAndLiabilitiesPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net asset and liabilities per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NetAssetAndLiabilitiesPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Asset and Liabilities Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NetAssetAndLiabilitiesPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Net asset and liabilities per share.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TermBenchmarkLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Term Benchmark Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TermBenchmarkLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Term Benchmark Loan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TermBenchmarkLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Term benchmark loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Operating Segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NumberOfOperatingSegments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of operating segments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HighTechIndustriesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of the economy consisting of companies engaged in technology-related business activities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HighTechIndustriesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">High Tech Industries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HighTechIndustriesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">High Tech Industries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FiduciaireJean-MarcFaberFJMFMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fiduciaire Jean-Marc Faber (FJMF) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FiduciaireJean-MarcFaberFJMFMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fiduciaire Jean-Marc Faber (FJMF).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FiduciaireJean-MarcFaberFJMFMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fiduciaire Jean-Marc Faber (FJMF)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AlternativeInvestmentMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Range of Significant Unobservable Inputs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AlternativeInvestmentMeasurementInput_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Alternative Investment, Measurement Input</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash collateral paid (received)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Asset, Subject to Master Netting Arrangement, Collateral, Obligation to Return Cash, Offset Against Derivative Asset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Tax Basis, Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tax cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AlertSRCNewcoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Alert SRC Newco [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AlertSRCNewcoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Alert SRC Newco [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AlertSRCNewcoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Alert SRC Newco, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Realized Gain (Loss), on Foreign Currency of Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Realized gain loss on foreign currency of debt.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net realized loss on foreign currency of debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net realized loss on foreign currency of debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned At Fair Value And Cash Equivalents Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment owned at fair value and cash equivalents fair value disclosure.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments and Cash Equivalents, Market Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DividendsDeclaredTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Distributions Declared and Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DividendsDeclaredTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Dividends Declared [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ElectronicMerchantSystemsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Electronic Merchant Systems, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ElectronicMerchantSystemsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Electronic Merchant Systems, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ElectronicMerchantSystemsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Electronic Merchant Systems, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Distribution Made to Limited Liability Company (LLC) Member [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ElevationNewCoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Elevation NewCo, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ElevationNewCoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Elevation NewCo, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ElevationNewCoLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Elevation NewCo, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StockRepurchaseProgramExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Share Repurchase Program, Expiration Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StockRepurchaseProgramExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchase Deadline Request</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_StockRepurchaseProgramExpirationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Share repurchase closing date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Payable on Subordinated Notes Payable to Members</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest payable on subordinated notes payable to members.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest payable on subordinated notes payable to members</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment company increase in net assets from change in income tax expenses other than book profit.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company Increase In Net Assets From Change In Income Tax Expenses Other Than Book Profit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income for tax but not book</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Income for tax but not book</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of amortization expense attributable to debt issuance costs and upfront commitment fee.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortization of Deferred Financing Costs and Upfront Commitment Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of deferred financing costs and upfront commitment fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AwaydayMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Awayday</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AwaydayMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Awayday.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AwaydayMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Awayday [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfManagingDealerReceiveAFeeOfOfferingProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage Of managing dealer receive a fee of offering proceeds.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfManagingDealerReceiveAFeeOfOfferingProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage Of Managing Dealer Receive a Fee of Offering Proceeds</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfManagingDealerReceiveAFeeOfOfferingProceeds_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of managing dealer receive fee of offering proceeds</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TartanBidcoPtyLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tartan Bidco Pty. Ltd. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TartanBidcoPtyLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tartan Bidco Pty. Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TartanBidcoPtyLtdMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tartan Bidco Pty. Ltd</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInvestmentsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Investments [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recent Accounting Pronouncements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">New Accounting Pronouncements, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BeverageFoodAndTobaccoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to beverage, food and tobacco.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BeverageFoodAndTobaccoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Beverage Food and Tobacco [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BeverageFoodAndTobaccoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Beverage, Food &amp; Tobacco</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BeverageFoodAndTobaccoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Beverage Food and Tobacco</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AGSAmericanGlassServicesAcquisitionLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AGS American Glass Services Acquisition, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AGSAmericanGlassServicesAcquisitionLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">AGS American Glass Services Acquisition, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AGSAmericanGlassServicesAcquisitionLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">AGS American Glass Services Acquisition, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payment for Purchase, Investment, Operating Activity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Purchases of investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FiftyUSBidcoIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fifty U.S. Bidco Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FiftyUSBidcoIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Fifty U.S. Bidco Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FiftyUSBidcoIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fifty U.S. Bidco Inc</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDividendDistribution_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTotalLabel">Net Decrease in Net Assets Resulting from Distributions to Shareholders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDividendDistribution_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net Decrease in Net Assets Resulting from Distributions to Shareholders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDividendDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Taxable distributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDividendDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Dividend Distribution</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDividendDistribution_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Taxable Distributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FacilityAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Facility Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FacilityAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Facility Agreements [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FacilityAgreementsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Facility Agreements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPaidInKindInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of paid in kind interest from asset measured at fair value on recurring basis using unobservable input (level 3).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPaidInKindInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Paid in Kind Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPaidInKindInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Paid-in-kind interest income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RelatedPartyTransactionOperatingExpenseRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operating Expense Ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RelatedPartyTransactionOperatingExpenseRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction Operating Expense Ratio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RelatedPartyTransactionOperatingExpenseRatio_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Related party transaction operating expense ratio.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MMCLOWH1CreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">MM CLO WH 1 Credit Facility [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MMCLOWH1CreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">MM CLO WH 1 Credit Facility Member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MMCLOWH1CreditFacilityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">MM CLO WH 1 Credit Facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfInvestmentByGeographicRegionTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Investment by Geographic Region</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfInvestmentByGeographicRegionTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of investment by geographic region.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfInvestmentByGeographicRegionTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Investment by Geographic Region [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FireInsuranceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related fire insurance.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FireInsuranceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fire Insurance [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FireInsuranceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fire Insurance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FireInsuranceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">FIRE: Insurance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyPortfolioTurnover_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Portfolio turnover</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyPortfolioTurnover_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Portfolio Turnover</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInReceivableForInvestmentSold_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Increase in investments due to PIK</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInReceivableForInvestmentSold_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Receivable for Investment Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepurchaseAgreementDateOfRepurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repurchase Agreement, Date of Repurchase</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RepurchaseAgreementDateOfRepurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchase Pricing Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Borrowings on debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Long-Term Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Proceeds from Issuance of Long-Term Debt, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTypeExtensibleEnumeration_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Type [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfShareRepurchases_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Share Repurchases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfShareRepurchases_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The Percentage of share repurchases.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfShareRepurchases_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of share repurchase</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Unrecognized Tax Benefits, Income Tax Penalties and Interest Expense, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expenses for uncertain tax position</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Holdings, Schedule of Investments [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of SLPIIs portfolio at fair value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common shares outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Shares held</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares, Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Common Shares outstanding at the end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Common Stock, Shares, Outstanding, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDeclarationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Distribution Made to Limited Liability Company (LLC) Member, Declaration Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDeclarationDate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Date Declared</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Processes Integrated [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentTransitionReport_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Transition Report</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PMAParentHoldingsLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">PMA Parent Holdings, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PMAParentHoldingsLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">PMA Parent Holdings, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PMAParentHoldingsLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PMA Parent Holdings, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueDiscountedCashFlowMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Discounted cash flows</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ValuationTechniqueDiscountedCashFlowMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Valuation Technique, Discounted Cash Flow [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LEPCPCo-InvestLPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">LEP CP Co-Invest, L.P. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LEPCPCo-InvestLPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">LEP CP Co-Invest, L.P.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LEPCPCo-InvestLPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">LEP CP Co-Invest, L.P.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments for Repurchase of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repurchase of Common Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfInvestmentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Investments [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net change in unrealized appreciation on forward currency exchange contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net change in unrealized appreciation on forward currency exchange contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized Appreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrealized Gain (Loss) on Derivatives</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StatementOfCashFlowsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Cash Flows [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Current Federal Tax Expense (Benefit)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Provision for federal income taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from shares sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Value, New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Proceeds from Common Shares sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossUnrealizedExcludingInvestmentPriceChangeBeforeTax_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net change in unrealized appreciation on foreign currency translation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossUnrealizedExcludingInvestmentPriceChangeBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrealized Gain (Loss), Foreign Currency Transaction, Excluding Investment Price Change, before Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossUnrealizedExcludingInvestmentPriceChangeBeforeTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net change in unrealized appreciation (depreciation) on foreign currency translation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SensortowerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SensorTower [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SensortowerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to SensorTower.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SensortowerMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SensorTower</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedNotesInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subordinated Notes in Investment Vehicles [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedNotesInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to subordinated notes in investment vehicles.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedNotesInInvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subordinated Notes in Investment Vehicles</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestRateSwapMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate Swap</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestRateSwapMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Rate Swap [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts and Financing Receivables [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FinancingProviderMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Financing Provider</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FinancingProviderMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financing Provider [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FinancingProviderMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Goldman Sachs Bank USA (the "Financing Provider")</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeePayableCapitalGainBased_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee Payable, Capital-Gain-Based</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncentiveFeePayableCapitalGainBased_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued capital gains incentive fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashHeldInForeignCurrencyAcquisitionCost_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Foreign cash, cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashHeldInForeignCurrencyAcquisitionCost_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalent, Held in Foreign Currency, Acquisition Cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AdvancedAircrewAcademyLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Advanced Aircrew Academy Llc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AdvancedAircrewAcademyLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Advanced aircrew academy Llc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AdvancedAircrewAcademyLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Advanced Aircrew Academy, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseOfCommonSharesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repurchase of Common Shares Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseOfCommonSharesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Repurchase of common shares payable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseOfCommonSharesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchase of Common Shares payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CashEquivalentsPercentOfNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Equivalents Percent Of Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CashEquivalentsPercentOfNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cash equivalents percent of net assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CashEquivalentsPercentOfNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">% of NAV, Cash Equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total unobservable inputs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Processes Integrated [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Investment Portfolio at Amortized Cost and Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net investment income (loss) after taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net investment (loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Operating, after Expense and Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net investment income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Investment Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HGInsightsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">HG Insights, Inc.[Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HGInsightsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">HG Insights, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HGInsightsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">HG Insights, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfNetAssetValuePerShareTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Month-End NAV Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfNetAssetValuePerShareTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Net Asset Value Per Share [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfNetAssetValuePerShareTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of net asset value per share.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net increase (decrease) in net assets resulting from operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetIncomeLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Increase in Net Assets Resulting from Operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BankOfNewYorkMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to Bank of New York.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BankOfNewYorkMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bank Of New York [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BankOfNewYorkMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Bank of New York</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Thirty November Two Thousand And Twenty Three One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Thirty november two thousand and twenty three one.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">November 30, 2023</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChartbeatMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Chartbeat</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChartbeatMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Chartbeat [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChartbeatMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Chartbeat.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Percentage of spread on variable rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment, Basis Spread, Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Basis Spread, Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">December 29, 2023</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Nine December Two Thousand Twenty Three [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyThreeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty nine december two thousand twenty three.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FederalIncomeTaxAndOtherTaxRisksMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Federal Income Tax and Other Tax Risks [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FederalIncomeTaxAndOtherTaxRisksMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Federal income tax and other tax risks.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentRestrictionStatus_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Restriction Status [true false]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EasyIceLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Easy Ice LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EasyIceLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Easy Ice LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EasyIceLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Easy Ice LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfMinimumUtilizationFee_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The percentage of minimum utilization fee.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfMinimumUtilizationFee_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Minimum Utilization Fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfMinimumUtilizationFee_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of minimum utilization fee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTaxBasisIncomeTaxable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Tax Basis, Income, Taxable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTaxBasisIncomeTaxable_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Taxable/Distributable Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SecuritiesTransactionsRevenueRecognitionAndExpensesPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Disclosure of accounting policy for securities transactions, revenue recognition and expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SecuritiesTransactionsRevenueRecognitionAndExpensesPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Securities Transactions, Revenue Recognition And Expenses Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SecuritiesTransactionsRevenueRecognitionAndExpensesPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Securities Transactions, Revenue Recognition and Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionLongTermCapitalGain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Distribution, Long-Term Capital Gain</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionLongTermCapitalGain_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Long-Term Capital Gains</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PolloTropicalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pollo Tropical [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PolloTropicalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pollo Tropical</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PolloTropicalMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Pollo tropical.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CPKIPCOBuyerLLCSubordinatedDebtMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">CPK IPCO Buyer LLC Subordinated Debt [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CPKIPCOBuyerLLCSubordinatedDebtMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">CPK IPCO Buyer LLC Subordinated Debt.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CPKIPCOBuyerLLCSubordinatedDebtMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CPK IPCO Buyer LLC Subordinated Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentFiscalYearFocus_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Fiscal Year Focus</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate Floor Two</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Rate Floor Two [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorTwoMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest rate floor two.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">December 29, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Nine December Two Thousand Twenty Five One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty nine december two thousand twenty five one.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subordinated [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Subordinated member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subordinated</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concentration Risk Benchmark [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ThirtyAprilTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Thirty April Two Thousand And Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ThirtyAprilTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Thirty april two thousand and twenty four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ThirtyAprilTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">April 30, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RecoupmentOfExpenseSupportMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Recoupment of Expense Support</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RecoupmentOfExpenseSupportMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Recoupment of Expense Support [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RecoupmentOfExpenseSupportMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Recoupment of expense support.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CubeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cube [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CubeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Cube [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CubeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cube</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeMaturityDates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Settlement Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeMaturityDates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative, Contract End Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineFebruaryTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Nine February Two Thousand Twenty four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineFebruaryTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty nine february two thousand twenty four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyNineFebruaryTwoThousandTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">February 29, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LoansAndLeasesReceivableNonperformingLoanAndLeasePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Loans and Leases Receivable, Nonperforming Loan and Lease, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LoansAndLeasesReceivableNonperformingLoanAndLeasePolicy_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Non-Accrual Loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_IncentiveFeeBasedOnIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to incentive fees based on income.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_IncentiveFeeBasedOnIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fee Based On Income [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_IncentiveFeeBasedOnIncomeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fee based on income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Nonconsolidated Subsidiary [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RisksRelatingToInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Risks Relating to Investments [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RisksRelatingToInvestmentsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Risks relating to investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementPolicyPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Valuation of Portfolio Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyIncomeAndExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyIncomeAndExpenseAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Supplemental Income and Expense [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net investment income (loss) before taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Net Investment Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Investment Income Before Taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetInvestmentIncome_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net investment income before taxes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AGSAmericanServicesInvestmentsLPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AGS American Services Investments, L.P. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AGSAmericanServicesInvestmentsLPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">AGS American Services Investments, L.P.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AGSAmericanServicesInvestmentsLPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">AGS American Services Investments, L.P.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BCCHGSInvestments2LPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">BCC HGS Investments 2 LP [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BCCHGSInvestments2LPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">BCC HGS Investments 2 LP.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BCCHGSInvestments2LPMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BCC HGS Investments 2, LP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueDisclosuresAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Disclosures [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Commitments and Contingencies Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_CA_lbl" xlink:role="http://www.xbrl.org/2003/role/label">CANADA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_CA_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Canada</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ElevationNewCoIntermediateLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Elevation NewCo Intermediate, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ElevationNewCoIntermediateLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Elevation NewCo Intermediate, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ElevationNewCoIntermediateLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Elevation NewCo Intermediate, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GovineerSolutionsFkaBlackMountainMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Govineer Solutions (fka Black Mountain)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GovineerSolutionsFkaBlackMountainMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Govineer Solutions (fka Black Mountain) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GovineerSolutionsFkaBlackMountainMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Govineer Solutions (fka Black Mountain).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NumberOfBorrowers_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of borrowers at reporting date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NumberOfBorrowers_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Number of Borrowers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_NumberOfBorrowers_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of borrowers in SLP II</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionToShareholdersPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Shareholder distributions from income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionToShareholdersPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Distribution to Shareholders, Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionToShareholdersPerShare_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Distribution declared</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedPercentOfNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">% of NAV</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedPercentOfNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned, Net Assets, Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedPercentOfNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">% of Members' Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDueToAffiliates_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Due to affiliate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDueToAffiliates_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Due to Affiliates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDueToAffiliates_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Increase in payable to affiliate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Outstanding balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Line of Credit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Long-Term Line of Credit, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCredit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revolving credit facility</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTaxBasisExpenseNotDeductible_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Tax Basis, Expense, Not Deductible</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyTaxBasisExpenseNotDeductible_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expenses not currently deductible</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentRiskAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Instrument [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Assets, Fair Value Disclosure, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AssetsFairValueDisclosure_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unobservable inputs not developed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forward Currency Exchange Contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativesPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivatives, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Fair Value Disclosure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt Instrument, Fair Value Disclosure, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OdysseyBehavioralHealthMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Odyssey Behavioral Health</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OdysseyBehavioralHealthMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Odyssey Behavioral Health [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OdysseyBehavioralHealthMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Odyssey behavioral health.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ProfessionalFeesAndOtherExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Professional Fees And Other Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ProfessionalFeesAndOtherExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Professional fees and other expenses.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ProfessionalFeesAndOtherExpenses_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Professional fees and other expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PayableInvestmentPurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Payable for investments purchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PayableInvestmentPurchase_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payable, Investment, Purchase</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OpenSwapContractIdentifierAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Open Swap Contract, Identifier [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_Security12bTitle_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Title of 12(b) Security</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MeasurementInputBookValueMultipleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Book Value Multiple [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MeasurementInputBookValueMultipleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Measurement input book value multiple.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MeasurementInputBookValueMultipleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Book Value Multiple</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Derivatives</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Instruments and Hedging Activities Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedInvestmentsPercentOfNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Restricted investments percentage of net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RestrictedInvestmentsPercentOfNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Restricted Investments, Percent of Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related and Nonrelated Parties [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConstructionBuildingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Construction &amp; Building [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConstructionBuildingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to construction and building sector.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConstructionBuildingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Construction &amp; Building</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ApprissMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Appriss</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ApprissMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Appriss [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ApprissMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Appriss.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeLessThanOrEqualToCatchUpAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to pre-incentive fee net investment income less than or equal to catch up amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeLessThanOrEqualToCatchUpAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre Incentive Fee Net Investment Income Less Than or Equal To Catch Up Amount [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeLessThanOrEqualToCatchUpAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Pre-incentive fee net investment income less than or equal to Catch-Up Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Distributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributionPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Distribution [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_DocumentInformationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Document Information [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RetailNextMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">RetailNext [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RetailNextMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">RetailNext.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RetailNextMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">RetailNext</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PlaskolitePPCIntermediateIILLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Plaskolite PPC Intermediate II LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PlaskolitePPCIntermediateIILLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Plaskolite PPC Intermediate II LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PlaskolitePPCIntermediateIILLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Plaskolite PPC Intermediate II LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned At Cost And Cash Equivalents Carrying Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment Owned At Cost And Cash Equivalents Carrying Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortized cost, Investments and Cash Equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RetailNextHoldingsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">RetailNext Holdings, Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RetailNextHoldingsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">RetailNext Holdings, Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RetailNextHoldingsIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">RetailNext Holdings, Inc</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VacationRentalBrandsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vacation Rental Brands, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VacationRentalBrandsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Vacation rental brands, Llc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VacationRentalBrandsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vacation Rental Brands, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Tax Disclosure [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeTaxDisclosureAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income Tax</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Recurring and Nonrecurring [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfTaxableDistributionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Schedule of taxable distributions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfTaxableDistributionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule Of Taxable Distributions [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfTaxableDistributionsTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Tax Character of Distributions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AmendedAndRestatedBylawsDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amended and Restated Bylaws Description</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AmendedAndRestatedBylawsDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Description of amended and restated bylaws.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AmendedAndRestatedBylawsDescription_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Description of amended and restated bylaws</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unrecognized Tax Benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Unrecognized Tax Benefits, Ending Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Unrecognized Tax Benefits, Beginning Balance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnrecognizedTaxBenefits_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrecognized tax benefits</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Accrued Liabilities and Other Operating Liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Accrued expenses and other liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfOutstandingSharesPurchased_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Outstanding Shares Purchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfOutstandingSharesPurchased_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Percentage of outstanding shares purchased.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfOutstandingSharesPurchased_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of Outstanding Shares Purchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OwlAcquisitionLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Owl Acquisition, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OwlAcquisitionLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Owl Acquisition, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_OwlAcquisitionLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Owl Acquisition, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LargestInvesteeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Largest Investee</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LargestInvesteeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the investee the entity has invested its assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LargestInvesteeMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Largest Investee [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_GB_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">United Kingdom</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_GB_lbl" xlink:role="http://www.xbrl.org/2003/role/label">UNITED KINGDOM</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_GG_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Guernsey</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_GG_lbl" xlink:role="http://www.xbrl.org/2003/role/label">GUERNSEY</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Income Location, Balance [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentsOwnedExcludingInvestmentsUnobservableInputsNotDeveloped_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of investments owned, excluding the investments of which the advisor did not developed unobservable inputs for the determination of fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentsOwnedExcludingInvestmentsUnobservableInputsNotDeveloped_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments Owned Excluding Investments Unobservable Inputs Not Developed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentsOwnedExcludingInvestmentsUnobservableInputsNotDeveloped_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair value of assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_TradingSymbol_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Trading Symbol</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_HedgingAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hedging Assets, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_HedgingAssetsCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest rate swap</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net change in unrealized appreciation on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net change in unrealized appreciation on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt and Equity Securities, Unrealized Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Debt and Equity Securities, Unrealized Gain (Loss), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net change in unrealized appreciation on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Related Party Transactions, by Related Party [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfShareholderServicingAndOrDistributionFeeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Shareholder Servicing and/or Distribution Fees</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfShareholderServicingAndOrDistributionFeeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Shareholder Servicing and or Distribution Fee [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ScheduleOfShareholderServicingAndOrDistributionFeeTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of shareholder servicing and or distribution fees the company pays.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventTypeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Event Type [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RisksRelatingToInfectiousDiseasesAndPandemicsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Risks Relating to Infectious Diseases and Pandemics [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RisksRelatingToInfectiousDiseasesAndPandemicsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Risks relating to infectious diseases and pandemics.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ThirtyMayTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Thirty May Two Thousand And Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ThirtyMayTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Thirty may two thousand and twenty four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ThirtyMayTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">May 30, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash Flows From Financing Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Percentage of unused fee at annual rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unused commitment fee (as a percent)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Unused Capacity, Commitment Fee Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedBalanceAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned, Balance [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentOwnedBalanceAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments at fair value:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityExTransitionPeriod_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Ex Transition Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Equity Method Investments [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Measurements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Distribution Made to Limited Partner, Distributions Declared, Per Unit</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestAndDebtExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total interest and debt financing expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestAndDebtExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest and Debt Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cap on NAV</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction Upfront Transaction Fee Cap Percentage</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Related party transaction upfront transaction fee cap percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorEightMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Rate Floor Eight [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorEightMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest rate floor eight.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorEightMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate Floor Eight</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SummaryOfAllExpensesSupportedAndRecoupedByTheAdviserTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tabular disclosure of all expenses supported and recouped by the adviser.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SummaryOfAllExpensesSupportedAndRecoupedByTheAdviserTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Summary of All Expenses Supported and Recouped By The Adviser</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SummaryOfAllExpensesSupportedAndRecoupedByTheAdviserTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Summary of All Expenses Supported and Recouped By The Adviser [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfTrailingQuarters_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of trailing quarters for pre incentive fee net investment income calculation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfTrailingQuarters_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre Incentive Fee Net Investment Income Calculation, Number Of Trailing Quarters</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfTrailingQuarters_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of trailing quarters for pre-incentive fee net investment income calculation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueByAssetClassAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Asset Class [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Highlights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Financial Highlights [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Investments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Investments_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Investments, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForPeriodFromOneMonthAnniversaryOfClosingDateToTwoMonthAnniversaryOfClosingDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to the period from the one-month anniversary of the closing date to the two-month anniversary of the closing date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForPeriodFromOneMonthAnniversaryOfClosingDateToTwoMonthAnniversaryOfClosingDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">For the Period From the One-Month Anniversary of the Closing Date to the Two-Month Anniversary of the Closing Date [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForPeriodFromOneMonthAnniversaryOfClosingDateToTwoMonthAnniversaryOfClosingDateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">For the period from one-month anniversary of closing date to two-month anniversary of closing date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PPTGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PPT Group</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PPTGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">PPT Group [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PPTGroupMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">PPT group.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidInsurance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid insurance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidInsurance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Insurance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net investment income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Investment Income (Loss), Per Share, Basic</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Basic and diluted net investment income per share of common stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AtsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">ATS [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AtsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to ATS.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AtsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">ATS</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdministrativeServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Administrator</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdministrativeServiceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Administrative Service [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MajorCustomersAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Customer [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Owned And Cash Equivalents Percent Of Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment owned and cash equivalents percent of net assets.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">% of NAV, Investments and Cash Equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDividendsReceivable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Dividends Receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDividendsReceivable_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Dividend receivable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterestAndDividend_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Income, Interest and Dividend</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterestAndDividend_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Dividend, Interest, and PIK Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentIncomeInterestAndDividend_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Investment Income, Interest and Dividend, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentSecuritiesWeightedAverageYield_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Securities Weighted Average Yield</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentSecuritiesWeightedAverageYield_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Weighted average yield on investment securities at reporting date.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentSecuritiesWeightedAverageYield_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average yield on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssetCounterpartyNameExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Counterparty</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssetCounterpartyNameExtensibleList_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Asset, Counterparty Name [Extensible Enumeration]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Borrowing Base is Greater Than or Equal to 1.60 Times</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Maximum [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_MaximumMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Tax Basis, Unrealized Gain (Loss)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net unrealized appreciation on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DesignatedAsHedgingInstrumentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Designated as Hedging Instrument [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DesignatedAsHedgingInstrumentMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Designated as Hedging Instrument</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RangeAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statistical Measurement [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prepaid expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Prepaid Expense, Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PrepaidExpenseCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Prepaid Expense, Current, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FirstLienSeniorSecuredLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to first lien senior secured loan.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FirstLienSeniorSecuredLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">First Lien Senior Secured Loan [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FirstLienSeniorSecuredLoanMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">First Lien Senior Secured Loan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AmberstoneCo.Ltd.Member_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents Amberstone Co., Ltd. ("Amberstone").</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AmberstoneCo.Ltd.Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amberstone Co., Ltd. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AmberstoneCo.Ltd.Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amberstone Co., Ltd.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetailSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Retail Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RetailSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Retail</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Value, Issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Common Shares, $0.01 par value (35,671,560 and 13,988,959 shares issued and outstanding, respectively)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDividendDistributionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Distributions to Shareholders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDividendDistributionAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Dividend Distribution [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidInsurance_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Prepaid insurance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidInsurance_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Prepaid Insurance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInPrepaidInsurance_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Decrease (Increase) in prepaid insurance</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate1_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit facility expiration date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate1_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Expiration Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LindstromLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Lindstrom, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LindstromLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Lindstrom, LLC.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LindstromLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Lindstrom, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AgrofreshSolutionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AgroFresh Solutions [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AgrofreshSolutionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to AgroFresh Solutions.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AgrofreshSolutionsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">AgroFresh Solutions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConsolidationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basis of Consolidation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ConsolidationPolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consolidation, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Including Portion Attributable to Noncontrolling Interest</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Net Assets, beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Net Assets at End of Period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total members' Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total members' equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyCommittedCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Committed Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyCommittedCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Capital commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PayRangeLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">PayRange, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PayRangeLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">PayRange, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PayRangeLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PayRange, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GeneralRiskFactorsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">General Risk Factors [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GeneralRiskFactorsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">General risk factors.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentNonIncomeProducing_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Nonincome Producing [true false]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Expense Support</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction, Amounts of Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Engagement fee paid to managing dealer</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FinancingReceivableNonAccrualNumberOfLoans_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The number of financing receivables on non accrual status.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FinancingReceivableNonAccrualNumberOfLoans_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Financing Receivable, Non Accrual, Number of Loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FinancingReceivableNonAccrualNumberOfLoans_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of loans</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BankingFinanceInsuranceAndRealEstateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Banking Finance Insurance And Real Estate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BankingFinanceInsuranceAndRealEstateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to banking, finance, insurance and real estate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BankingFinanceInsuranceAndRealEstateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Banking, Finance, Insurance &amp; Real Estate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Processes for Assessing, Identifying, and Managing Threats [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfDerivatives_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net realized gain (loss) on forward currency exchange contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfDerivatives_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gain (Loss) on Sale of Derivatives</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfDerivatives_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total net realized and unrealized gain (loss) on forward currency exchange contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfDerivatives_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Net realized gain on forward currency exchange contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GainLossOnSaleOfDerivatives_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Net realized gain (loss) on foreign currency transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnAugustTwentyNineTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Repurchase Request Deadline on August Twenty Nine Two Thousand Twenty Five [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnAugustTwentyNineTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Repurchase request deadline on august twenty nine two thousand twenty five.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnAugustTwentyNineTwoThousandTwentyFiveMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Repurchase Deadline Request August 29, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialRatiosAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Financial Ratios [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialRatiosAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ratios/Supplemental data:</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortization of deferred financing costs and debt issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amortization of Debt Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AmortizationOfFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Amortization of deferred financing costs and debt issuance costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityPublicFloat_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Public Float</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Distributions Made to Limited Liability Company (LLC) Member [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HeadsUpTechnologiesIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Heads Up Technologies, Inc. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HeadsUpTechnologiesIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Heads Up Technologies, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HeadsUpTechnologiesIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Heads Up Technologies, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfUnderwiringCompensationOnGrossProceedsOfPrimaryOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the percentage of underwriting compensation from all sources in connection with this offering, including the shareholder servicing and/or distribution fee and other underwriting compensation on gross proceeds of primary offering.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfUnderwiringCompensationOnGrossProceedsOfPrimaryOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Percentage of Underwiring Compensation on Gross Proceeds of Primary Offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PercentageOfUnderwiringCompensationOnGrossProceedsOfPrimaryOffering_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of underwiring compensation of gross proceeds from primary offering</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ContainersPackagingAndGlassMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Containers Packaging And Glass [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ContainersPackagingAndGlassMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Containers Packaging And Glass Member</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ContainersPackagingAndGlassMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Containers, Packaging &amp; Glass</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ContainersPackagingAndGlassMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Containers, Packaging &amp; Glass</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Outstanding Borrowings</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Schedule of Debt [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Schedule of Components of Carrying Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_FR_lbl" xlink:role="http://www.xbrl.org/2003/role/label">FRANCE</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="country_FR_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">France</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Agreements and Related Party Transactions</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Organization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsNotesAndLoansReceivableLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounts, Notes, Loans and Financing Receivable [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountsNotesAndLoansReceivableLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Warehousing Transaction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityRegistrantName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Registrant Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChaseIndustriesIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Chase Industries, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChaseIndustriesIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Chase Industries Inc [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ChaseIndustriesIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Chase Industries Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net realized gain on investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of subsidiary gain (loss) recognized in income from asset measured at fair value on recurring basis using unobservable input (level 3).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsSubsidiary_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement With Unobservable Inputs Reconciliation Recurring Basis Asset Gain Loss Included In Earnings, Subsidiary</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpensePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Expense, Policy [Policy Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestExpensePolicyTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate Swaps</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount of transfer between level 3</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Transfers, Net, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Reclassifications</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityVoluntaryFilers_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Voluntary Filers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForestProductsAndPaperMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Forest Products and Paper [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForestProductsAndPaperMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Forest products and paper.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ForestProductsAndPaperMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Forest Products &amp; Paper</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subordinated Note Investment Vehicles Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Subordinated note investment vehicles interest rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Other Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Other Nonoperating Income (Expense)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OtherNonoperatingIncomeExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Other Nonoperating Income (Expense), Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Additional Paid in Capital</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Paid-in-capital in excess of par value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AdditionalPaidInCapital_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Additional Paid in Capital, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SubsequentEventsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subsequent Events [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cybersecurity Risk Management Positions or Committees Responsible [Flag]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ElectronicMerchantSystemsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Electronic Merchant Systems [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ElectronicMerchantSystemsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Electronic Merchant Systems</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ElectronicMerchantSystemsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Electronic Merchant Systems</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Assets Measured on Recurring Basis, Unobservable Input Reconciliation [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Fair Value Measurements</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentAffiliatedIssuerControlledMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment, Affiliated Issuer, Controlled [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentAffiliatedIssuerControlledMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Affiliated Issuer Controlled [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentAffiliatedIssuerControlledMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Investment Controlled Affiliate Investment [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Secured Overnight Financing Rate (SOFR) Overnight Index Swap Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">3-month Term SOFR</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">SOFR</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeVariableInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative, Variable Interest Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeVariableInterestRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Company Pays</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PurchasePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Purchase Price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PurchasePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Purchase price.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PurchasePrice_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Purchase price</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VesscoMidcoHoldingsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vessco Midco Holdings, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VesscoMidcoHoldingsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Vessco midco holdings Llc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VesscoMidcoHoldingsLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vessco Midco Holdings, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentPercentOfPortfolioFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The percentage of total portfolio at fair value.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentPercentOfPortfolioFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Percent Of Portfolio Fair Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentPercentOfPortfolioFairValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage of Total Portfolio</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Repurchase of common shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchased During Period, Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount Repurchased</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedTerseLabel">Repurchase of common shares, net of early repurchase deduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance of Common Stock</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from issuance of Common Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostsAndExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Costs and Expenses [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostsAndExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CostsAndExpensesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Valuation Techniques and Significant Unobservable Inputs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value Measurement Inputs and Valuation Techniques [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AdvancedAircrewMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Advanced Aircrew [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AdvancedAircrewMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Advanced Aircrew.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AdvancedAircrewMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Advanced Aircrew</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityCommonStockSharesOutstanding_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Common Stock, Shares Outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubAdministratorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to sub-administrator.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubAdministratorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sub Administrator [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubAdministratorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Sub-administrator</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Nonconsolidated Subsidiary [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total increase (decrease) in net assets during the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stockholders' Equity, Period Increase (Decrease)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityPeriodIncreaseDecrease_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total increase in net assets during the period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestAndDividendIncomeOperatingPaidInKind_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest and Dividend Income, Operating, Paid in Kind</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InterestAndDividendIncomeOperatingPaidInKind_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">PIK income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetAssetValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net asset value per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetAssetValuePerShare_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Net asset value per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetAssetValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">NAV Per Share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetAssetValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/periodEndLabel">Net asset value at end of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetAssetValuePerShare_lbl" xlink:role="http://www.xbrl.org/2003/role/periodStartLabel">Net asset value at beginning of period</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseRatioIncludingVoluntaryFeeWaiver_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Ratio of net expenses to average net assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseRatioIncludingVoluntaryFeeWaiver_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Expense Ratio, after Voluntary Fee Waiver Deduction</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Financial Highlights [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Financial Highlights</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_Assets_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedCapitalLossCarryforward_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Distributable Earnings (Loss), Accumulated Capital Loss Carryforward</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedCapitalLossCarryforward_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Long-term capital loss carryforward</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDateOfRecord_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Distribution Made to Limited Liability Company (LLC) Member, Date of Record</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDateOfRecord_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Record Date</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Income Statement [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilityFairValueOfCollateral_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Collateral on forward currency exchange contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilityFairValueOfCollateral_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liability, Fair Value of Collateral</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeLiabilityFairValueOfCollateral_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Collateral on foreign currency exchange contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SpindriftMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Spindrift [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SpindriftMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Spindrift.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SpindriftMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Spindrift</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FactsGlobalEnergyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Facts Global Energy</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FactsGlobalEnergyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Facts Global Energy [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FactsGlobalEnergyMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Facts global energy.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_WeightedAverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Weighted average</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_WeightedAverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Weighted Average [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDerivativeAssets_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Increase (Decrease) in Derivative Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncreaseDecreaseInDerivativeAssets_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Collateral on forward currency exchange contracts</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentSoldCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentSoldCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity Method Investment, Amount Sold</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EquityMethodInvestmentSoldCarryingAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Equity Method Investment, Amount Sold, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcPreferredEquityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Legacy Corporate Lending HoldCo</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcPreferredEquityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Legacy corporate lending holdCo, LLC preferred equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcPreferredEquityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Legacy Corporate Lending HoldCo, LLC Preferred Equity [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Proceeds from shares sold, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, New Issues</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Number of Class I shares issued</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MediaAdvertisingPrintingAndPublishingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related to media, advertising, printing &amp; publishing.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MediaAdvertisingPrintingAndPublishingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Media: Advertising, Printing &amp; Publishing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MediaAdvertisingPrintingAndPublishingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Media: Advertising, Printing &amp; Publishing</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TotalSeniorSecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Total Senior Securities [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TotalSeniorSecuritiesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Total Senior Securities.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Earnings Per Share, Diluted, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Per Share, Diluted</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Basic and diluted weighted average common stock outstanding</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EarningsPerShareDiluted_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Diluted increase (decrease) in net assets resulting from operations per share</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_CityAreaCode_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City Area Code</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Interest Rate Floor Four</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Interest Rate Floor Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InterestRateFloorFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Interest rate floor four.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorName_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Auditor Name</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturingInYearsFourAndFive_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">3-5 years</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturingInYearsFourAndFive_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Long-Term Debt, Maturity, Year Four and Five</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LongTermDebtMaturingInYearsFourAndFive_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Long-Term Debt, Maturity, Year Four and Five, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Quarterly Financial Information [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Selected Quarterly Financial Data (unaudited)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GaleriaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Galeria [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GaleriaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Galeria.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_GaleriaMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Galeria</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Aggregate principal amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total aggregate principal amount committed</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Debt Instrument, Face Amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DebtInstrumentFaceAmount_lbl" xlink:role="http://www.xbrl.org/2009/role/netLabel">Principal amount of debt</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Maximum commitment amount</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Maximum Borrowing Capacity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Maximum borrowing capacity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ServicesBusinessMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related services, business.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ServicesBusinessMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Services, Business [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ServicesBusinessMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Services, Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ServicesBusinessMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Services: Business</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Counterparty Name [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EarningsBeforeInterestTaxDepreciationAndAmortizationOfMiddleMarketCompanies_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of earnings before interest, tax, depreciation and amortization of middle market companies.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EarningsBeforeInterestTaxDepreciationAndAmortizationOfMiddleMarketCompanies_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Earnings Before Interest, Tax, Depreciation and Amortization of Middle Market Companies</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EarningsBeforeInterestTaxDepreciationAndAmortizationOfMiddleMarketCompanies_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">EBITDA</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EnduranceHoldcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Endurance Holdco Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EnduranceHoldcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Endurance Holdco Limited.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EnduranceHoldcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Endurance Holdco Limited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AllworthFinancialGroupLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Allworth Financial Group, L.P.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AllworthFinancialGroupLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Allworth Financial Group Lp [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AllworthFinancialGroupLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Allworth Financial Group, L.P</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueOfDerivativeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Gross amount of (liabilities) on the consolidated statements of assets and liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueOfDerivativeLiability_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Liability, Subject to Master Netting Arrangement, before Offset</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeFairValueOfDerivativeLiability_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Gross amount of (liabilities) on the consolidated statements of assets and liabilities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AwardDateAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Award Date [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentsAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentOnVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Vehicles</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentOnVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment on Vehicles [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentOnVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Investment on Vehicles [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AMIMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">AMI [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AMIMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">AMI.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AMIMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">AMI</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EheHealthMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EHE Health [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EheHealthMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">EHE Health.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EheHealthMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">EHE Health</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_StockRepurchaseProgramMonthlyRedemptionsPercentOfNetAssetValueMaximum_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Repurchase Program Monthly Redemptions Percent of Net Asset Value Maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_StockRepurchaseProgramMonthlyRedemptionsPercentOfNetAssetValueMaximum_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Monthly redemptions, percent of net asset value, maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_StockRepurchaseProgramMonthlyRedemptionsPercentOfNetAssetValueMaximum_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Stock repurchase program monthly redemptions percent of net asset lalue maximum</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AwardDateDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Award Date [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Nonconsolidated Subsidiary [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Company, Nonconsolidated Subsidiary [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DiscoverySeniorLivingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Discovery Senior Living [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DiscoverySeniorLivingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Discovery Senior Living.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_DiscoverySeniorLivingMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Discovery Senior Living</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TrancheANotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tranche A Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TrancheANotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tranche A Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TrancheANotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranche A Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ApolloIntelligenceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Apollo Intelligence</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ApolloIntelligenceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to Apollo Intelligence.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ApolloIntelligenceMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Apollo Intelligence [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_IncentiveFeesVoluntarilyWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of incentive fee voluntarily waived during the period.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_IncentiveFeesVoluntarilyWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Incentive Fees Voluntarily Waived</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_IncentiveFeesVoluntarilyWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Incentive fees voluntarily waived</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HotelGamingAndLeisureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hotel, Gaming, &amp; Leisure</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HotelGamingAndLeisureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related hotel, gaming and leisure.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HotelGamingAndLeisureMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hotel, Gaming And Leisure [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashAndCashEquivalentsAxis_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash and Cash Equivalents [Axis]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RedMedOperationsCollageRehabilitationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">RedMed Operations (Collage Rehabilitation) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RedMedOperationsCollageRehabilitationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">RedMed operations (collage rehabilitation).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RedMedOperationsCollageRehabilitationMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">RedMed Operations (Collage Rehabilitation)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SeventeenJulyTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Seventeen July Two Thousand And Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SeventeenJulyTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Seventeen july two thousand and twenty four member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SeventeenJulyTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">July 17, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedDebtBasisSpreadVariableRate_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Subordinated Debt Basis Spread Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedDebtBasisSpreadVariableRate_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Subordinated debt basis spread variable rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SubordinatedDebtBasisSpreadVariableRate_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subordinated Debt Basis Spread Variable Rate</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Stock Issuance Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payments of offering costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Underwriting Fees/Offering Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Level 1</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueInputsLevel1Member_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Inputs, Level 1 [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Financing Activity, Including Discontinued Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Net Cash Provided by Financing Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Notes Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Notes Payable, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Subordinated notes payable to members</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NotesPayable_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Subordinated notes payable to Members</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ShortTermDebtLineItems_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Short-Term Debt [Line Items]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_UnreimbursedExpenseSupportMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unreimbursed Expense Support</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_UnreimbursedExpenseSupportMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unreimbursed Expense Support [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_UnreimbursedExpenseSupportMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Unreimbursed expense support.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Unamortized Debt Issuance Expense</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unamortized debt financing cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Unamortized debt financing cost</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorLocation_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Auditor Location</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MetalsAndMiningMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Metals &amp; Mining</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MetalsAndMiningMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Metals and Mining [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_MetalsAndMiningMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Metals and mining.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ManagementFeePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Administrative fees payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ManagementFeePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Management Fee Payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ManagementFeePayable_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Base management fee payable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related investment vehicles.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Vehicles</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentVehiclesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investment Vehicles</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Principal repayments and sales of investments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Asset, Sales</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeContractTypeDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Contract [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyThreeAugustTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">August 23, 2024</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyThreeAugustTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Three August Two Thousand And Twenty Four [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyThreeAugustTwoThousandAndTwentyFourMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty three august two thousand and twenty four member.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentsOperationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Assets held for their financial return as part of the entity's operations.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentsOperationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investments Operations [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentsOperationsMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Investments Operations</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VesscoWaterMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Vessco Water [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VesscoWaterMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Vessco Water</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_VesscoWaterMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Vessco Water</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityInteractiveDataCurrent_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Interactive Data Current</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReceivedPurchaseOrders_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Received Purchase Orders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReceivedPurchaseOrders_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Received Purchase Orders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ReceivedPurchaseOrders_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Received purchase orders</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HempzMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Hempz.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HempzMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hempz [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HempzMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hempz</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Expenses</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Expense, after Reduction of Fee Waiver and Reimbursement [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_IncomeStatementLocationDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Statement of Income Location, Balance [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Cash Flows From Operating Activities</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Provided by (Used in) Operating Activity, Including Discontinued Operation [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConcessionsDevelopmentGroupLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Concessions Development Group, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConcessionsDevelopmentGroupLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Concessions Development Group, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConcessionsDevelopmentGroupLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Concessions Development Group, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_Series2025SeniorNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Series 2025 Senior Notes [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_Series2025SeniorNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Series 2025 Senior Notes.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_Series2025SeniorNotesMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Series 2025 Senior Notes</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CRHHealthcarePurchaserIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">CRH Healthcare Purchaser, Inc. [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CRHHealthcarePurchaserIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">CRH Healthcare Purchaser, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CRHHealthcarePurchaserIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">CRH Healthcare Purchaser, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CityBarbequeLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">City Barbeque LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CityBarbequeLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">City barbeque Llc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CityBarbequeLlcMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">City Barbeque, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SaturnPurchaserCorpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Saturn Purchaser Corp.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SaturnPurchaserCorpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Saturn Purchaser Corp [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SaturnPurchaserCorpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Saturn Purchaser Corp.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfTreasuryStockByClassTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Treasury Stock [Table Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfTreasuryStockByClassTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Schedule of Share Repurchases</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Cash Equivalents, at Carrying Value</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Cash Equivalents, at Carrying Value, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CashEquivalentsAtCarryingValue_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amortized Cost, Cash Equivalents</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Financial Highlights [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Dividends, Per Share, Declared</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Declared distribution (in dollars per share)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Line of credit facility, current borrowing capacity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Line of Credit Facility, Current Borrowing Capacity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HellersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Hellers</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HellersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Hellers [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_HellersMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Hellers.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityTaxIdentificationNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Tax Identification Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net Assets</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Equity, Including Portion Attributable to Noncontrolling Interest [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RevenuesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Revenues [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConsumerSectorDurableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Consumer goods: Durable</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConsumerSectorDurableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related to consumer sector durable.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_ConsumerSectorDurableMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Consumer Sector Durable [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SONIAPlusSixPointThreeEightPercentageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">SONIA + 6.38%</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SONIAPlusSixPointThreeEightPercentageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">SONIA Plus Six Point Three Eight Percentage [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SONIAPlusSixPointThreeEightPercentageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">SONIA plus six point three eight percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Organization, Consolidation and Presentation of Financial Statements Disclosure [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Organization</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AmountOfExpenseSupportMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Amount of Expense Support</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AmountOfExpenseSupportMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Amount of Expense Support [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AmountOfExpenseSupportMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of expense support.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WholesaleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related to wholesale.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WholesaleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Wholesale [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WholesaleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Wholesale</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CatchUpAmountPercentMultipliedToNav_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The percentage multiplied to NAV for catch up amount calculation.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CatchUpAmountPercentMultipliedToNav_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Catch Up Amount, Percent Multiplied To NAV</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_CatchUpAmountPercentMultipliedToNav_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Percentage multiplied to NAV for Catch-Up Amount calculation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Effect of foreign currency exchange rates</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Effect of Exchange Rate on Cash, Cash Equivalent, Restricted Cash, and Restricted Cash Equivalent, Continuing Operation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOrSaleOfEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Proceeds from Issuance or Sale of Equity</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOrSaleOfEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Proceeds from sale of shares offered</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ProceedsFromIssuanceOrSaleOfEquity_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Proceeds from Issuance or Sale of Equity, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_LocalPhoneNumber_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Local Phone Number</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_RelatedPartyTransactionDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Related Party Transaction [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AvalonBidcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Avalon Bidco Limited [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AvalonBidcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Avalon Bidco Limited.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_AvalonBidcoLimitedMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Avalon Bidco Limited</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Twenty Five June Two Thousand And Twenty Five One [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Twenty five june two thousand and twenty five one.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveOneMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">June 25, 2025</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GrossInvestmentIncomeOperating_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Total interest income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GrossInvestmentIncomeOperating_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Total investment income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GrossInvestmentIncomeOperating_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Gross Investment Income, Operating</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_GrossInvestmentIncomeOperating_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Total investment income</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_AuditorOpinionTextBlock_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Auditor Opinion [Text Block]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Derivative Asset, Gross Asset Including Not Subject to Master Netting Arrangement, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unrealized Appreciation</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Payments of financing costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Payments of Financing Costs</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_PaymentsOfFinancingCosts_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Payments of Financing Costs, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputRevenueMultipleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Measurement Input, Revenue Multiple [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_MeasurementInputRevenueMultipleMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Revenue Multiple</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_AccountingPoliciesAbstract_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Accounting Policies [Abstract]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BcsfAdvisorsLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to BCSF Advisors, LP.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BcsfAdvisorsLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">BCSF Advisors, LP [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BcsfAdvisorsLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">BCSF Advisors, LP</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BcsfAdvisorsLpMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Advisor</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Distributions reinvested, shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock Issued During Period, Shares, Dividend Reinvestment Plan</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">Dividend reinvestment, Shares</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAccretionAmortizationOfDiscountPremium_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Amount of accretion of discounts (amortization of premiums) on asset measured at fair value on recurring basis using unobservable input (level 3).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAccretionAmortizationOfDiscountPremium_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fair Value, Measurement with Unobservable Inputs Reconciliation, Recurring Basis, Net Accretion (Amortization) of Discount (Premium)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAccretionAmortizationOfDiscountPremium_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Net accretion of discounts (amortization of premiums)</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RNEnterprisesLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">RN Enterprises, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RNEnterprisesLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">RN Enterprises, LLC [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_RNEnterprisesLLCMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">RN Enterprises, LLC</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeEqualToLessThanCatchUpAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents information pertaining to pre-incentive fee net investment income less than or equal to catch up amount.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeEqualToLessThanCatchUpAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Pre Incentive Fee Net Investment Income Equal To Less Than Catch Up Amount [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeEqualToLessThanCatchUpAmountMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Prior advisory agreement</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EURIBORPlusSixPointTwoFivePercentageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/verboseLabel">EURIBOR + 6.25%</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EURIBORPlusSixPointTwoFivePercentageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">EURIBOR Plus Six Point Two Five Percentage [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EURIBORPlusSixPointTwoFivePercentageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">EURIBOR plus six point two five percentage.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TrancheBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Tranche B</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TrancheBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Tranche B [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_TrancheBMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Tranche B.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyContractualFeeWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Base management fee waiver</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyContractualFeeWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Company, Contractual Fee Waived</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyContractualFeeWaived_lbl" xlink:role="http://www.xbrl.org/2003/role/totalLabel">Investment Company, Contractual Fee Waived, Total</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_InvestmentCompanyContractualFeeWaived_lbl" xlink:role="http://www.xbrl.org/2009/role/negatedLabel">Base management fee waiver</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentUnfundedCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">The amount of unfunded commitments to purchase investments.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentUnfundedCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Investment Unfunded Commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_InvestmentUnfundedCommitments_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Unfunded commitments</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ClassOfStockDomain_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Class of Stock [Domain]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WUHoldcoIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">WU Holdco, Inc.[Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WUHoldcoIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Represents the information pertaining to WU Holdco, Inc.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_WUHoldcoIncMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">WU Holdco, Inc</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_AffiliatedEntityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Affiliated Entity [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="srt_AffiliatedEntityMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Affiliated Entity [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_ScheduleOfStockByClassTable_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Stock, Class of Stock [Table]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorizedUnlimited_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Common Stock, Shares Authorized, Unlimited [Fixed List]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="us-gaap_CommonStockSharesAuthorizedUnlimited_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Class I shares, shares authorized</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EnvironmentalIndustriesSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related environmental industries.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EnvironmentalIndustriesSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Environmental Industries Sector [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EnvironmentalIndustriesSectorMember_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Environmental Industries</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="dei_EntityEmergingGrowthCompany_lbl" xlink:role="http://www.xbrl.org/2003/role/terseLabel">Entity Emerging Growth Company</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BankBillSwapBidRateBBSYMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Bank bill swap bid rate (BBSY).</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EuroInterbankOfferedRateEuriborMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Euro interbank offered rate (Euribor) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BankBillBenchmarkRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Bank Bill Benchmark Rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FireFinanceControlledAffiliateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Fire Finance Controlled Affiliate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SterlingOvernightIndexAverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Sterling Overnight Index Average [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_FireFinanceControlledAffiliateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sector of economy consisting of companies engaged in business activity related fire finance controlled affiliate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BankBillSwapBidRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bank Bill Swap Bid Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BankBillSwapBidRateBBSYMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bank Bill Swap Bid Rate (BBSY) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BankBillBenchmarkRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Bank Bill Benchmark Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EuroInterbankOfferedRateEuriborMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Euro Interbank Offered Rate (Euribor) [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EuroInterbankOfferedRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/label">Euro Interbank Offered Rate [Member]</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_BankBillSwapBidRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Bank bill swap bid rate.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_SterlingOvernightIndexAverageMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Sterling overnight index average.</link:label>
          <link:label xml:lang="en-US" xlink:type="resource" xlink:label="ck0001899017_EuroInterbankOfferedRateMember_lbl" xlink:role="http://www.xbrl.org/2003/role/documentation">Euro interbank offered rate.</link:label>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesSubscriptions" xlink:to="us-gaap_CommonStockSharesSubscriptions_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SubordinatedDebtSpreadVariableRate" xlink:to="ck0001899017_SubordinatedDebtSpreadVariableRate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EquityInterestsInInvestmentVehiclesMember" xlink:to="ck0001899017_EquityInterestsInInvestmentVehiclesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BtxPrecisionMember" xlink:to="ck0001899017_BtxPrecisionMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RepurchaseRequestDeadlineOnNovemberThirtyTwoThousandTwentyFourMember" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnNovemberThirtyTwoThousandTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:to="us-gaap_IncreaseDecreaseInInterestPayableNet_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PercentageOfSharesValidlyTendered" xlink:to="ck0001899017_PercentageOfSharesValidlyTendered_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_GovineerSolutionsLLCMember" xlink:to="ck0001899017_GovineerSolutionsLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskByTypeAxis" xlink:to="us-gaap_ConcentrationRiskByTypeAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember" xlink:to="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityIncorporationStateCountryCode" xlink:to="dei_EntityIncorporationStateCountryCode_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency" xlink:to="us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CreditAdjustmentSpreadMember" xlink:to="ck0001899017_CreditAdjustmentSpreadMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BalanceSheetLocationDomain" xlink:to="us-gaap_BalanceSheetLocationDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_WarehousingTransactionTextBlock" xlink:to="ck0001899017_WarehousingTransactionTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ValuationTechniqueComparableCompanyMultipleMember" xlink:to="ck0001899017_ValuationTechniqueComparableCompanyMultipleMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInTradingLiabilities" xlink:to="us-gaap_IncreaseDecreaseInTradingLiabilities_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SecondLienSeniorSecuredLoansMember" xlink:to="ck0001899017_SecondLienSeniorSecuredLoansMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CommonClassDMember" xlink:to="ck0001899017_CommonClassDMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CashEquivalentsAtFairValue" xlink:to="ck0001899017_CashEquivalentsAtFairValue_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BcpcProjectAberdeenLlcMember" xlink:to="ck0001899017_BcpcProjectAberdeenLlcMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BCCTrilliumFoodsInvestments2LPMember" xlink:to="ck0001899017_BCCTrilliumFoodsInvestments2LPMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ProfessionalFeesAndOperatingExpensesPolicyTextBlock" xlink:to="ck0001899017_ProfessionalFeesAndOperatingExpensesPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_EquityAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCurrentReportingStatus" xlink:to="dei_EntityCurrentReportingStatus_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased" xlink:to="us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RfrLoanMember" xlink:to="ck0001899017_RfrLoanMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel2Member" xlink:to="us-gaap_FairValueInputsLevel2Member_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_LegacyCorporateLendingHoldcoLlcClassACommonEquityMember" xlink:to="ck0001899017_LegacyCorporateLendingHoldcoLlcClassACommonEquityMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ReinvestmentOfDividends" xlink:to="ck0001899017_ReinvestmentOfDividends_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity" xlink:to="us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock" xlink:to="us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_DistributionAndShareholderServicingFees" xlink:to="ck0001899017_DistributionAndShareholderServicingFees_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_HollywoodLPMember" xlink:to="ck0001899017_HollywoodLPMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_JanuaryThirtyFirstTwoThousandTwentyFourMember" xlink:to="ck0001899017_JanuaryThirtyFirstTwoThousandTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:to="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalPeriodFocus" xlink:to="dei_DocumentFiscalPeriodFocus_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_IncentiveFeeCapMember" xlink:to="ck0001899017_IncentiveFeeCapMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityShellCompany" xlink:to="dei_EntityShellCompany_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BCCCPKInvestments2LPMember" xlink:to="ck0001899017_BCCCPKInvestments2LPMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SummerFridaysLLCMember" xlink:to="ck0001899017_SummerFridaysLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SharesValidlyTenderedForRepurchase" xlink:to="ck0001899017_SharesValidlyTenderedForRepurchase_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyTotalReturnBeforeIncentiveFees" xlink:to="us-gaap_InvestmentCompanyTotalReturnBeforeIncentiveFees_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock" xlink:to="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyFourAprilTwoThousandAndTwentyFiveMember" xlink:to="ck0001899017_TwentyFourAprilTwoThousandAndTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsNet" xlink:to="us-gaap_AssetsNet_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncentiveFeePayableIncomeBased" xlink:to="us-gaap_IncentiveFeePayableIncomeBased_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract" xlink:to="cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesIssued" xlink:to="us-gaap_CommonStockSharesIssued_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag" xlink:to="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_LegacyCorporateLendingHoldcoLlcMember" xlink:to="ck0001899017_LegacyCorporateLendingHoldcoLlcMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_OrganizationCosts" xlink:to="ck0001899017_OrganizationCosts_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetailMember" xlink:to="us-gaap_RetailMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PMAMember" xlink:to="ck0001899017_PMAMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_DuracoMember" xlink:to="ck0001899017_DuracoMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestReceivable" xlink:to="us-gaap_InterestReceivable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare" xlink:to="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIndustrySectorExtensibleEnumeration" xlink:to="us-gaap_InvestmentIndustrySectorExtensibleEnumeration_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PcfMember" xlink:to="ck0001899017_PcfMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OffsettingAssetsTable" xlink:to="us-gaap_OffsettingAssetsTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:to="us-gaap_InvestmentOwnedBalancePrincipalAmount_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BLIBuyerIncMember" xlink:to="ck0001899017_BLIBuyerIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PsychiatricMedicalCareLLCMember" xlink:to="ck0001899017_PsychiatricMedicalCareLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIdentifierAxis" xlink:to="us-gaap_InvestmentIdentifierAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_DerivativeInstrumentAverageNotionalAmount" xlink:to="ck0001899017_DerivativeInstrumentAverageNotionalAmount_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RocSkincareMember" xlink:to="ck0001899017_RocSkincareMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ReceivableInvestmentSale" xlink:to="us-gaap_ReceivableInvestmentSale_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WarrantMember" xlink:to="us-gaap_WarrantMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFilerCategory" xlink:to="dei_EntityFilerCategory_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourOneMember" xlink:to="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourOneMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BCCCPKInvestments2LPEquityInterestMember" xlink:to="ck0001899017_BCCCPKInvestments2LPEquityInterestMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RevolverCommitmentMember" xlink:to="ck0001899017_RevolverCommitmentMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SpotlessBrandsLlcMember" xlink:to="ck0001899017_SpotlessBrandsLlcMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration" xlink:to="us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" xlink:to="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentInterestRate" xlink:to="us-gaap_InvestmentInterestRate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquitySecuritiesByIndustryAxis" xlink:to="us-gaap_EquitySecuritiesByIndustryAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CashEquivalentsInterestRate" xlink:to="ck0001899017_CashEquivalentsInterestRate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_SummaryOfInvestmentHoldingsLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TrancheBNotesMember" xlink:to="ck0001899017_TrancheBNotesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentySevenJuneTwoThousandAndTwentyFourMember" xlink:to="ck0001899017_TwentySevenJuneTwoThousandAndTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByBalanceSheetGroupingTextBlock" xlink:to="us-gaap_FairValueByBalanceSheetGroupingTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveMember" xlink:to="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FacilitiesMember" xlink:to="ck0001899017_FacilitiesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TransportationCargoSectorMember" xlink:to="ck0001899017_TransportationCargoSectorMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag" xlink:to="cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:to="us-gaap_QuarterlyFinancialInformationDisclosureAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_DerivativeLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:to="us-gaap_CashAndCashEquivalentsFairValueDisclosure_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyVoluntaryFeeWaived" xlink:to="us-gaap_InvestmentCompanyVoluntaryFeeWaived_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_SubsequentEventLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AllbridgeLlcMember" xlink:to="ck0001899017_AllbridgeLlcMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ShareRepurchaseProgramTable" xlink:to="srt_ShareRepurchaseProgramTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskManagementThirdPartyEngagedFlag" xlink:to="cyd_CybersecurityRiskManagementThirdPartyEngagedFlag_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ReimbursementEligibilityExpirationDateJanuaryThirtyOneThousandTwentySevenMember" xlink:to="ck0001899017_ReimbursementEligibilityExpirationDateJanuaryThirtyOneThousandTwentySevenMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeAssetNotionalAmount" xlink:to="us-gaap_DerivativeAssetNotionalAmount_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIncomeInterest" xlink:to="us-gaap_InvestmentIncomeInterest_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_SegmentGeographicalDomain" xlink:to="srt_SegmentGeographicalDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_WellsFargoMember" xlink:to="ck0001899017_WellsFargoMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy" xlink:to="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_NetAssetCommonStockValue" xlink:to="ck0001899017_NetAssetCommonStockValue_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PercentOfAssetCoverage" xlink:to="ck0001899017_PercentOfAssetCoverage_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CommonClassIMember" xlink:to="ck0001899017_CommonClassIMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_WarehousingTransactionAbstract" xlink:to="ck0001899017_WarehousingTransactionAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredFinanceCostsNet" xlink:to="us-gaap_DeferredFinanceCostsNet_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentMaturityDate" xlink:to="us-gaap_InvestmentMaturityDate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyFourFebruaryTwoThousandAndTwentyFiveMember" xlink:to="ck0001899017_TwentyFourFebruaryTwoThousandAndTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeAssetFairValueGrossLiability" xlink:to="us-gaap_DerivativeAssetFairValueGrossLiability_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyMember" xlink:to="us-gaap_RelatedPartyMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:to="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" xlink:to="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SignificantAccountingPoliciesTextBlock" xlink:to="us-gaap_SignificantAccountingPoliciesTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FiestaHoldingsLLCMember" xlink:to="ck0001899017_FiestaHoldingsLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashEquivalents" xlink:to="us-gaap_RestrictedCashEquivalents_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_MasterConcessionAirMember" xlink:to="ck0001899017_MasterConcessionAirMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_GaapIncentiveFeeMember" xlink:to="ck0001899017_GaapIncentiveFeeMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ShareRepurchaseProgramAxis" xlink:to="srt_ShareRepurchaseProgramAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_WSHPCottonwoodBuyerLLCMember" xlink:to="ck0001899017_WSHPCottonwoodBuyerLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InterestRateFloorThreeMember" xlink:to="ck0001899017_InterestRateFloorThreeMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskManagementStrategyAndGovernanceTable" xlink:to="cyd_CybersecurityRiskManagementStrategyAndGovernanceTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquitySecuritiesMember" xlink:to="us-gaap_EquitySecuritiesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PrecisionConceptsParentIncMember" xlink:to="ck0001899017_PrecisionConceptsParentIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInOtherReceivables" xlink:to="us-gaap_IncreaseDecreaseInOtherReceivables_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyDistributionOrdinaryIncome" xlink:to="us-gaap_InvestmentCompanyDistributionOrdinaryIncome_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:to="us-gaap_InvestmentUnaffiliatedIssuerMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:to="us-gaap_DividendsPayableCurrentAndNoncurrent_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareBasic" xlink:to="us-gaap_EarningsPerShareBasic_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInManagementFeePayable" xlink:to="us-gaap_IncreaseDecreaseInManagementFeePayable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepaymentsOfLongTermDebt" xlink:to="us-gaap_RepaymentsOfLongTermDebt_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_RealizedInvestmentGainsLossesAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SONIAPlusSixPointFourTwoPercentageMember" xlink:to="ck0001899017_SONIAPlusSixPointFourTwoPercentageMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyTotalReturn" xlink:to="us-gaap_InvestmentCompanyTotalReturn_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_HedgingDesignationDomain" xlink:to="us-gaap_HedgingDesignationDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncentiveFeeExpense" xlink:to="us-gaap_IncentiveFeeExpense_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_GalanthusGroupHoldingsLimitedMember" xlink:to="ck0001899017_GalanthusGroupHoldingsLimitedMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_DelayedDrawCommitment1Member" xlink:to="ck0001899017_DelayedDrawCommitment1Member_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyExpenseRatioBeforeIncentiveAllocation" xlink:to="us-gaap_InvestmentCompanyExpenseRatioBeforeIncentiveAllocation_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TelecommunicationsMember" xlink:to="ck0001899017_TelecommunicationsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate" xlink:to="ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EngineeredProductsCoLLCMember" xlink:to="ck0001899017_EngineeredProductsCoLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingAfterTax" xlink:to="us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingAfterTax_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" xlink:to="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="srt_ShareRepurchaseProgramDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ForestProductsAndPaperSectorMember" xlink:to="ck0001899017_ForestProductsAndPaperSectorMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EXTAcquisitionsIncMember" xlink:to="ck0001899017_EXTAcquisitionsIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InterestRateFloorSixMember" xlink:to="ck0001899017_InterestRateFloorSixMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_DividendReinvestmentPlanPolicyTextBlock" xlink:to="ck0001899017_DividendReinvestmentPlanPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntitySmallBusiness" xlink:to="dei_EntitySmallBusiness_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TrusteeFees" xlink:to="us-gaap_TrusteeFees_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:to="us-gaap_LineOfCreditFacilityCommitmentFeeAmount_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_HedgingDesignationAxis" xlink:to="us-gaap_HedgingDesignationAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SikichMember" xlink:to="ck0001899017_SikichMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AOMInfusionMember" xlink:to="ck0001899017_AOMInfusionMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetainedEarningsAccumulatedDeficit" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AsprPacAcquisitionCoLlcMember" xlink:to="ck0001899017_AsprPacAcquisitionCoLlcMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_VitalPurchaserLlcMember" xlink:to="ck0001899017_VitalPurchaserLlcMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherCommitmentsLineItems" xlink:to="us-gaap_OtherCommitmentsLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_G702BuyerIncMember" xlink:to="ck0001899017_G702BuyerIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_EquitySecuritiesIndustryMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PreferredStockMember" xlink:to="us-gaap_PreferredStockMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityWellKnownSeasonedIssuer" xlink:to="dei_EntityWellKnownSeasonedIssuer_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyNineFebruaryTwoThousandAndTwentyFourMember" xlink:to="ck0001899017_TwentyNineFebruaryTwoThousandAndTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ManagementFeeExpenseVoluntarilyWaived" xlink:to="ck0001899017_ManagementFeeExpenseVoluntarilyWaived_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PercentageOfMinimumUtilizationThreshold" xlink:to="ck0001899017_PercentageOfMinimumUtilizationThreshold_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_MeasurementInputRecoveryRateMember" xlink:to="ck0001899017_MeasurementInputRecoveryRateMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember" xlink:to="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:to="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccumulatedAmortizationDeferredFinanceCosts" xlink:to="us-gaap_AccumulatedAmortizationDeferredFinanceCosts_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_UtilitiesElectricMember" xlink:to="ck0001899017_UtilitiesElectricMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfDividends" xlink:to="us-gaap_PaymentsOfDividends_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InterestRateFloorSevenMember" xlink:to="ck0001899017_InterestRateFloorSevenMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfDeferredCharges" xlink:to="us-gaap_AmortizationOfDeferredCharges_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral" xlink:to="us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonClassAMember" xlink:to="us-gaap_CommonClassAMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AmendmentFlag" xlink:to="dei_AmendmentFlag_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_VasaFitnessLLCMember" xlink:to="ck0001899017_VasaFitnessLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CityBbqMember" xlink:to="ck0001899017_CityBbqMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_KAMCHoldingsIncMember" xlink:to="ck0001899017_KAMCHoldingsIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskLineItems" xlink:to="us-gaap_ConcentrationRiskLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressPostalZipCode" xlink:to="dei_EntityAddressPostalZipCode_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BeverageFoodandTobaccoSectorMember" xlink:to="ck0001899017_BeverageFoodandTobaccoSectorMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockMember" xlink:to="us-gaap_CommonStockMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ICATLogisticsIncMember" xlink:to="ck0001899017_ICATLogisticsIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskRoleOfManagementTextBlock" xlink:to="cyd_CybersecurityRiskRoleOfManagementTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RisksRelatingToCommonSharesMember" xlink:to="ck0001899017_RisksRelatingToCommonSharesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EighteenJulyTwoThousandAndTwentyFiveMember" xlink:to="ck0001899017_EighteenJulyTwoThousandAndTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:to="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveMember" xlink:to="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfDebtDiscountPremium" xlink:to="us-gaap_AmortizationOfDebtDiscountPremium_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CashAndCashEquivalentsHeldInForeignCurrency" xlink:to="ck0001899017_CashAndCashEquivalentsHeldInForeignCurrency_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SeventeenMarchTwoThousandAndTwentyFiveMember" xlink:to="ck0001899017_SeventeenMarchTwoThousandAndTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PureWaferMember" xlink:to="ck0001899017_PureWaferMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:to="us-gaap_DebtInstrumentInterestRateEffectivePercentage_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine1" xlink:to="dei_EntityAddressAddressLine1_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxPolicyTextBlock" xlink:to="us-gaap_IncomeTaxPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShareAbstract" xlink:to="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShareAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag" xlink:to="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SupplementalCashFlowInformationAbstract" xlink:to="us-gaap_SupplementalCashFlowInformationAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:to="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeAssets" xlink:to="us-gaap_DerivativeAssets_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_OrganizationExpensesPolicyTextBlock" xlink:to="ck0001899017_OrganizationExpensesPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIssuerNameExtensibleEnumeration" xlink:to="us-gaap_InvestmentIssuerNameExtensibleEnumeration_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ConstructionAndBuildingSectorMember" xlink:to="ck0001899017_ConstructionAndBuildingSectorMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BalanceSheetLocationAxis" xlink:to="us-gaap_BalanceSheetLocationAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ManagementFeeExpense" xlink:to="us-gaap_ManagementFeeExpense_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SixteenOctoberTwoThousandAndTwentyFiveMember" xlink:to="ck0001899017_SixteenOctoberTwoThousandAndTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BeaconSpecializedLivingMember" xlink:to="ck0001899017_BeaconSpecializedLivingMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BlackbirdPurchaserIncMember" xlink:to="ck0001899017_BlackbirdPurchaserIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock" xlink:to="cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentySixNovemberTwoThousandAndTwentyFiveMember" xlink:to="ck0001899017_TwentySixNovemberTwoThousandAndTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputComparabilityAdjustmentMember" xlink:to="us-gaap_MeasurementInputComparabilityAdjustmentMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_DtiqTechnologiesIncMember" xlink:to="ck0001899017_DtiqTechnologiesIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentType" xlink:to="dei_DocumentType_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxesPaidNet" xlink:to="us-gaap_IncomeTaxesPaidNet_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TransportationCargoMember" xlink:to="ck0001899017_TransportationCargoMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TypeOfArrangementAxis" xlink:to="us-gaap_TypeOfArrangementAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease" xlink:to="us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ChemicalsPlasticsAndRubberMember" xlink:to="ck0001899017_ChemicalsPlasticsAndRubberMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:to="us-gaap_ArrangementsAndNonarrangementTransactionsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCentralIndexKey" xlink:to="dei_EntityCentralIndexKey_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityTable" xlink:to="us-gaap_LineOfCreditFacilityTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIncomeInvestmentExpense" xlink:to="us-gaap_InvestmentIncomeInvestmentExpense_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock" xlink:to="cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ForeignCurrencyTransactionGainLossRealized" xlink:to="us-gaap_ForeignCurrencyTransactionGainLossRealized_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ValuationTechniqueAxis" xlink:to="us-gaap_ValuationTechniqueAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourMember" xlink:to="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventTypeDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestIncomeOperating" xlink:to="us-gaap_InterestIncomeOperating_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_StockRepurchaseProgramHoldingPeriod" xlink:to="ck0001899017_StockRepurchaseProgramHoldingPeriod_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_JpmRevolvingCreditFacilityMember" xlink:to="ck0001899017_JpmRevolvingCreditFacilityMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockParOrStatedValuePerShare" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ZeusFireSecurityMember" xlink:to="ck0001899017_ZeusFireSecurityMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyNineMarchTwoThousandAndTwentyFourMember" xlink:to="ck0001899017_TwentyNineMarchTwoThousandAndTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_LiabilitiesAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ScheduleOfInvestmentByIndustryTableTextBlock" xlink:to="ck0001899017_ScheduleOfInvestmentByIndustryTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdministrativeFeesExpense" xlink:to="us-gaap_AdministrativeFeesExpense_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FourthAmendedAndRestatedDeclarationOfTrustTerm" xlink:to="ck0001899017_FourthAmendedAndRestatedDeclarationOfTrustTerm_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ScheduleOfUnrealizedAppreciationAndDepreciationOnInvestmentsForTaxPurposeTableTextBlock" xlink:to="ck0001899017_ScheduleOfUnrealizedAppreciationAndDepreciationOnInvestmentsForTaxPurposeTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncentiveFeeExpenseIncomeBased" xlink:to="us-gaap_IncentiveFeeExpenseIncomeBased_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentCompanyExpenseRecoupmentSupport" xlink:to="ck0001899017_InvestmentCompanyExpenseRecoupmentSupport_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BridgerAerospaceGroupHoldingsIncMember" xlink:to="ck0001899017_BridgerAerospaceGroupHoldingsIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PreferredEquityInterestRate" xlink:to="ck0001899017_PreferredEquityInterestRate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputEbitdaMultipleMember" xlink:to="us-gaap_MeasurementInputEbitdaMultipleMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement" xlink:to="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealizedInvestmentGainsLosses" xlink:to="us-gaap_RealizedInvestmentGainsLosses_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestIncomeOperatingPaidInCash" xlink:to="us-gaap_InterestIncomeOperatingPaidInCash_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFinStmtErrorCorrectionFlag" xlink:to="dei_DocumentFinStmtErrorCorrectionFlag_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturingInYearsTwoAndThree" xlink:to="us-gaap_LongTermDebtMaturingInYearsTwoAndThree_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtDisclosureAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_DE" xlink:to="country_DE_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember" xlink:to="ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:to="us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction" xlink:to="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_JhccHoldingsLlcMember" xlink:to="ck0001899017_JhccHoldingsLlcMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FiveLargestInvesteeMember" xlink:to="ck0001899017_FiveLargestInvesteeMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentTextBlock" xlink:to="us-gaap_InvestmentTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_DerivativeTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ConsumerGoodsDurableSectorMember" xlink:to="ck0001899017_ConsumerGoodsDurableSectorMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions" xlink:to="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract" xlink:to="us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_HedgeFundsMember" xlink:to="us-gaap_HedgeFundsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_IL" xlink:to="country_IL_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CurrentFiscalYearEndDate" xlink:to="dei_CurrentFiscalYearEndDate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PrepaidInsurancePolicyTextBlock" xlink:to="ck0001899017_PrepaidInsurancePolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EquityInterestInInvestmentVehiclesMember" xlink:to="ck0001899017_EquityInterestInInvestmentVehiclesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PrepaidFinancingCosts" xlink:to="ck0001899017_PrepaidFinancingCosts_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind" xlink:to="ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentQuarterlyReport" xlink:to="dei_DocumentQuarterlyReport_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ManagementFeeExpenseContractuallyWaived" xlink:to="ck0001899017_ManagementFeeExpenseContractuallyWaived_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeCollateralRightToReclaimCash" xlink:to="us-gaap_DerivativeCollateralRightToReclaimCash_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember" xlink:to="ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_NZ" xlink:to="country_NZ_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_DebtInstrumentInterestRateSwaps" xlink:to="ck0001899017_DebtInstrumentInterestRateSwaps_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressStateOrProvince" xlink:to="dei_EntityAddressStateOrProvince_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DistributionPayable" xlink:to="us-gaap_DistributionPayable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" xlink:to="us-gaap_InvestmentCompanyInvestmentIncomeLossRatio_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_WPEFIXBidco23BVFkaKeystoneBidcoBVMember" xlink:to="ck0001899017_WPEFIXBidco23BVFkaKeystoneBidcoBVMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_DelayedDrawCommitment2Member" xlink:to="ck0001899017_DelayedDrawCommitment2Member_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_OrionMidcoLLCMember" xlink:to="ck0001899017_OrionMidcoLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PBIGroupLLCMember" xlink:to="ck0001899017_PBIGroupLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="srt_EquityMethodInvesteeNameDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentOwnedBalanceShares" xlink:to="us-gaap_InvestmentOwnedBalanceShares_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_StatementGeographicalAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetInvestmentIncomeAbstract" xlink:to="us-gaap_NetInvestmentIncomeAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SubscriptionsReceivedInAdvancePolicyTextBlock" xlink:to="ck0001899017_SubscriptionsReceivedInAdvancePolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:to="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherGeneralAndAdministrativeExpense" xlink:to="us-gaap_OtherGeneralAndAdministrativeExpense_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AerospaceAndDefenseSectorMember" xlink:to="ck0001899017_AerospaceAndDefenseSectorMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AegVisionMember" xlink:to="ck0001899017_AegVisionMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RydooMember" xlink:to="ck0001899017_RydooMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_HeliosServicePartnersLLCMember" xlink:to="ck0001899017_HeliosServicePartnersLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AeriTekGlobalCADAcquisitionIncMember" xlink:to="ck0001899017_AeriTekGlobalCADAcquisitionIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost" xlink:to="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BainCapitalSeniorLoanProgramIILLCEquityInterestInvestmentVehiclesMember" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCEquityInterestInvestmentVehiclesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ValuationOfOtherFinancialAssetsAndFinancialLiabilitiesPolicyTextBlock" xlink:to="ck0001899017_ValuationOfOtherFinancialAssetsAndFinancialLiabilitiesPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventMember" xlink:to="us-gaap_SubsequentEventMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RisksRelatingToOurBusinessAndStructureMember" xlink:to="ck0001899017_RisksRelatingToOurBusinessAndStructureMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased" xlink:to="us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" xlink:to="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentySevenAugustTwoThousandAndTwentyFiveMember" xlink:to="ck0001899017_TwentySevenAugustTwoThousandAndTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentCompanyDistributableEarningsLossAccumulatedShortTermCapitalLossCarryforward" xlink:to="ck0001899017_InvestmentCompanyDistributableEarningsLossAccumulatedShortTermCapitalLossCarryforward_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" xlink:to="us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" xlink:to="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_NewMilaniGroupLLCMember" xlink:to="ck0001899017_NewMilaniGroupLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_LagerboxMember" xlink:to="ck0001899017_LagerboxMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentInterestRatePaidInKind" xlink:to="us-gaap_InvestmentInterestRatePaidInKind_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis" xlink:to="ck0001899017_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpenseDebt" xlink:to="us-gaap_InterestExpenseDebt_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ScheduleOfCarryingValuesOfDebtTableTextBlock" xlink:to="ck0001899017_ScheduleOfCarryingValuesOfDebtTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract" xlink:to="us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ShareRedemptionPriceUsedPercentOfMostRecentlyDisclosedNetAssetValue" xlink:to="ck0001899017_ShareRedemptionPriceUsedPercentOfMostRecentlyDisclosedNetAssetValue_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilityNotionalAmount" xlink:to="us-gaap_DerivativeLiabilityNotionalAmount_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentUnamortizedDiscount" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscount_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_NumberOfFacilityAgreements" xlink:to="ck0001899017_NumberOfFacilityAgreements_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_NameOfMajorCustomerDomain" xlink:to="srt_NameOfMajorCustomerDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilities" xlink:to="us-gaap_DerivativeLiabilities_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PeriodOfTerminationByNotice" xlink:to="ck0001899017_PeriodOfTerminationByNotice_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_DebtInvestmentAmountOfUnfundedRevolversDelayedDrawposition" xlink:to="ck0001899017_DebtInvestmentAmountOfUnfundedRevolversDelayedDrawposition_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_GsRevolvingCreditFacilityMember" xlink:to="ck0001899017_GsRevolvingCreditFacilityMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_BE" xlink:to="country_BE_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InterestRateFloorOneMember" xlink:to="ck0001899017_InterestRateFloorOneMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RisksRelatingToTheNinteenFourtyActMember" xlink:to="ck0001899017_RisksRelatingToTheNinteenFourtyActMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:to="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherCommitmentsTable" xlink:to="us-gaap_OtherCommitmentsTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InterestRateFloorFiveMember" xlink:to="ck0001899017_InterestRateFloorFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_R1RCMIncMember" xlink:to="ck0001899017_R1RCMIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AutomotiveSectorMember" xlink:to="us-gaap_AutomotiveSectorMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ClassSSharesMember" xlink:to="ck0001899017_ClassSSharesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RelatedPartyTransactionShareholderServicingAndDistributionFeesPercentage" xlink:to="ck0001899017_RelatedPartyTransactionShareholderServicingAndDistributionFeesPercentage_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SimplicityMember" xlink:to="ck0001899017_SimplicityMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FireFinanceSectorMember" xlink:to="ck0001899017_FireFinanceSectorMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyFifthOctoberTwoThousandTwentyFourMember" xlink:to="ck0001899017_TwentyFifthOctoberTwoThousandTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ThirtyOneJanuaryTwoThousandAndTwentyFourMember" xlink:to="ck0001899017_ThirtyOneJanuaryTwoThousandAndTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AerospaceSectorMember" xlink:to="us-gaap_AerospaceSectorMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MinimumMember" xlink:to="srt_MinimumMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_FinancialInstrumentAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:to="us-gaap_DerivativeFairValueOfDerivativeAsset_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFourMember" xlink:to="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductions" xlink:to="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductions_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyIncentiveFeeToAverageNetAssets" xlink:to="us-gaap_InvestmentCompanyIncentiveFeeToAverageNetAssets_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ClassISharesMember" xlink:to="ck0001899017_ClassISharesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_DebtInstrumentEffectiveInterestRateSwapHedge" xlink:to="ck0001899017_DebtInstrumentEffectiveInterestRateSwapHedge_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_QuarterlyFinancialInformationTextBlock" xlink:to="us-gaap_QuarterlyFinancialInformationTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashHeldInForeignCurrency" xlink:to="us-gaap_CashHeldInForeignCurrency_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel3Member" xlink:to="us-gaap_FairValueInputsLevel3Member_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ShareRepurchaseProgramLineItems" xlink:to="srt_ShareRepurchaseProgramLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:to="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ChiltonMember" xlink:to="ck0001899017_ChiltonMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember" xlink:to="ck0001899017_PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax" xlink:to="ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrealizedGainLossOnInvestments" xlink:to="us-gaap_UnrealizedGainLossOnInvestments_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BainCapitalSeniorLoanProgramIILLCPreferredEquityInterestInvestmentVehiclesMember" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCPreferredEquityInterestInvestmentVehiclesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BNPParibasMember" xlink:to="ck0001899017_BNPParibasMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_UtilitiesWaterMember" xlink:to="ck0001899017_UtilitiesWaterMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyNineJanuaryTwoThousandAndTwentyFiveMember" xlink:to="ck0001899017_TwentyNineJanuaryTwoThousandAndTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_RelatedPartyTransactionsAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:to="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SharesOutstanding" xlink:to="us-gaap_SharesOutstanding_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherIncome" xlink:to="us-gaap_OtherIncome_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_LogrhythmIncMember" xlink:to="ck0001899017_LogrhythmIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableAndAccruedLiabilitiesMember" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCashAndCashEquivalents" xlink:to="us-gaap_RestrictedCashAndCashEquivalents_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingencies" xlink:to="us-gaap_CommitmentsAndContingencies_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SolairusMember" xlink:to="ck0001899017_SolairusMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RepurchaseRequestDeadlineOnMayThirtyOneTwoThousandTwentyFourMember" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnMayThirtyOneTwoThousandTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_StockRepurchasedDuringPeriodIncludingEarlyRepurchaseDeduction" xlink:to="ck0001899017_StockRepurchasedDuringPeriodIncludingEarlyRepurchaseDeduction_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AuditorFirmId" xlink:to="dei_AuditorFirmId_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TrancheAMember" xlink:to="ck0001899017_TrancheAMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScenarioForecastMember" xlink:to="srt_ScenarioForecastMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ReimbursementPercentageOfOtherOperatingExpenses" xlink:to="ck0001899017_ReimbursementPercentageOfOtherOperatingExpenses_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLossSubsidiary" xlink:to="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLossSubsidiary_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SecondLienSeniorSecuredLoanMember" xlink:to="ck0001899017_SecondLienSeniorSecuredLoanMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CapitalEquipmentSectorMember" xlink:to="ck0001899017_CapitalEquipmentSectorMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RepurchaseRequestDeadlineOnFebruaryTwentyNineTwoThousandTwentyFourMember" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnFebruaryTwentyNineTwoThousandTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RedNucleusMember" xlink:to="ck0001899017_RedNucleusMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_IncreaseDecreaseInPrepaidFinancingCosts" xlink:to="ck0001899017_IncreaseDecreaseInPrepaidFinancingCosts_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" xlink:to="us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:to="us-gaap_ConcentrationRiskByBenchmarkAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_MinimumSubscriptionsForForwardObligationToPurchasePortfolioInvestments" xlink:to="ck0001899017_MinimumSubscriptionsForForwardObligationToPurchasePortfolioInvestments_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FirstLienSeniorSecuredLoansMember" xlink:to="ck0001899017_FirstLienSeniorSecuredLoansMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_JE" xlink:to="country_JE_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PharmacyPartnersMember" xlink:to="ck0001899017_PharmacyPartnersMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AbrLoanMember" xlink:to="ck0001899017_AbrLoanMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_HealthcareAndPharmaceuticalsMember" xlink:to="ck0001899017_HealthcareAndPharmaceuticalsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ValuationTechniqueCollateralCoverageMember" xlink:to="ck0001899017_ValuationTechniqueCollateralCoverageMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquitySecuritiesFvNiRestricted" xlink:to="us-gaap_EquitySecuritiesFvNiRestricted_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InterestRateFloorNineMember" xlink:to="ck0001899017_InterestRateFloorNineMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_AU" xlink:to="country_AU_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProfitLoss" xlink:to="us-gaap_ProfitLoss_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_DelayedDrawCommitmentMember" xlink:to="ck0001899017_DelayedDrawCommitmentMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ClassDSharesMember" xlink:to="ck0001899017_ClassDSharesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_MaximumEstimatedManagingDealerFee" xlink:to="ck0001899017_MaximumEstimatedManagingDealerFee_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_DividerAmountToDetermineFee" xlink:to="ck0001899017_DividerAmountToDetermineFee_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_LogrhythmMember" xlink:to="ck0001899017_LogrhythmMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossSubsidiary" xlink:to="ck0001899017_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossSubsidiary_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock" xlink:to="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BainCapitalSeniorLoanProgramLlcMember" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramLlcMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_StatementScenarioAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AMIBuyerIncMember" xlink:to="ck0001899017_AMIBuyerIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyEightMayTwoThousandAndTwentyFiveMember" xlink:to="ck0001899017_TwentyEightMayTwoThousandAndTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentInformationLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentInterestRateFloor" xlink:to="us-gaap_InvestmentInterestRateFloor_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_DtiqMember" xlink:to="ck0001899017_DtiqMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" xlink:to="us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPayableCurrentAndNoncurrent" xlink:to="us-gaap_InterestPayableCurrentAndNoncurrent_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock" xlink:to="cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventsTextBlock" xlink:to="us-gaap_SubsequentEventsTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebt" xlink:to="us-gaap_LongTermDebt_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:to="us-gaap_RelatedPartyTransactionsDisclosureTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableRateDomain" xlink:to="us-gaap_VariableRateDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_LEPSALCoInvestLPMember" xlink:to="ck0001899017_LEPSALCoInvestLPMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_MaximumFinancingCommitmentAmount" xlink:to="ck0001899017_MaximumFinancingCommitmentAmount_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet" xlink:to="us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_OghBidcoLimitedMember" xlink:to="ck0001899017_OghBidcoLimitedMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_StockholdersEquity_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_OfferingCostsPolicyTextBlock" xlink:to="ck0001899017_OfferingCostsPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfPrecedingCalendarQuarters" xlink:to="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfPrecedingCalendarQuarters_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_NafincoMember" xlink:to="ck0001899017_NafincoMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:to="us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:to="us-gaap_BasisOfAccountingPolicyPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="us-gaap_StatementOfStockholdersEquityAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ChexFinerFoodsLLCMember" xlink:to="ck0001899017_ChexFinerFoodsLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_WealthEnhancementGroupWegMember" xlink:to="ck0001899017_WealthEnhancementGroupWegMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ValuationTechniqueDomain" xlink:to="us-gaap_ValuationTechniqueDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashEquivalentsMember" xlink:to="us-gaap_CashEquivalentsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentSignificantUnobservableInput" xlink:to="us-gaap_InvestmentSignificantUnobservableInput_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UseOfEstimates" xlink:to="us-gaap_UseOfEstimates_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:to="us-gaap_ScheduleOfEquityMethodInvestmentsTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RepurchaseRequestDeadlineOnAugustThirtyOneTwoThousandTwentyFourMember" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnAugustThirtyOneTwoThousandTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PRGXMember" xlink:to="ck0001899017_PRGXMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PayRangeMember" xlink:to="ck0001899017_PayRangeMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ChoreoMember" xlink:to="ck0001899017_ChoreoMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncentiveFeePayable" xlink:to="us-gaap_IncentiveFeePayable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressAddressLine2" xlink:to="dei_EntityAddressAddressLine2_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueDisclosuresTextBlock" xlink:to="us-gaap_FairValueDisclosuresTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsReceivable" xlink:to="us-gaap_DividendsReceivable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_NL" xlink:to="country_NL_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AlldentHoldingGmbHMember" xlink:to="ck0001899017_AlldentHoldingGmbHMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentOwnedAtFairValue" xlink:to="us-gaap_InvestmentOwnedAtFairValue_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheAMember" xlink:to="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheAMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_US" xlink:to="country_US_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ACAMSMember" xlink:to="ck0001899017_ACAMSMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" xlink:to="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="us-gaap_DebtInstrumentNameDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyChangesInNetAssetsTableTextBlock" xlink:to="us-gaap_InvestmentCompanyChangesInNetAssetsTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputDiscountRateMember" xlink:to="us-gaap_MeasurementInputDiscountRateMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:to="us-gaap_AccruedLiabilitiesAndOtherLiabilities_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ReconomyMember" xlink:to="ck0001899017_ReconomyMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:to="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentConcentrationRiskMember" xlink:to="ck0001899017_InvestmentConcentrationRiskMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration" xlink:to="us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveMember" xlink:to="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConstructionSectorMember" xlink:to="us-gaap_ConstructionSectorMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpense" xlink:to="us-gaap_InterestExpense_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentySecondNovemberTwoThousandTwentyFourMember" xlink:to="ck0001899017_TwentySecondNovemberTwoThousandTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheBMember" xlink:to="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheBMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:to="us-gaap_EquityMethodInvestmentOwnershipPercentage_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock" xlink:to="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ScheduleOfReconciliationOfNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeTableTextBlock" xlink:to="ck0001899017_ScheduleOfReconciliationOfNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SauceCoHoldCoLLCMember" xlink:to="ck0001899017_SauceCoHoldCoLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock" xlink:to="cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation" xlink:to="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ForPeriodFromTwoMonthAnniversaryOfClosingDateToThreeMonthAnniversaryOfClosingDateMember" xlink:to="ck0001899017_ForPeriodFromTwoMonthAnniversaryOfClosingDateToThreeMonthAnniversaryOfClosingDateMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RepurchaseRequestDeadlineOnJuneTwoTwoThousandTwentyFiveMember" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnJuneTwoTwoThousandTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredChargesPolicyTextBlock" xlink:to="us-gaap_DeferredChargesPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AllbridgeMember" xlink:to="ck0001899017_AllbridgeMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AviationTechnicalServicesIncMember" xlink:to="ck0001899017_AviationTechnicalServicesIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:to="us-gaap_LineOfCreditFacilityAverageOutstandingAmount_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ReimbursementEligibilityExpirationDateNovemberThirtyTwoThousandTwentySixMember" xlink:to="ck0001899017_ReimbursementEligibilityExpirationDateNovemberThirtyTwoThousandTwentySixMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeMember" xlink:to="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityAddressCityOrTown" xlink:to="dei_EntityAddressCityOrTown_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ConsumerGoodsNonDurableSectorMember" xlink:to="ck0001899017_ConsumerGoodsNonDurableSectorMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_IT" xlink:to="country_IT_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentIssuerAffiliationDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockRepurchasedDuringPeriodShares" xlink:to="us-gaap_StockRepurchasedDuringPeriodShares_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_NonControlledAffiliateAndControlledAffiliateInvestmentsMember" xlink:to="ck0001899017_NonControlledAffiliateAndControlledAffiliateInvestmentsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NumberOfReportableSegments" xlink:to="us-gaap_NumberOfReportableSegments_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_SecurityExchangeName" xlink:to="dei_SecurityExchangeName_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_OnOrAfterFacilitiesEndDateMember" xlink:to="ck0001899017_OnOrAfterFacilitiesEndDateMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BainCapitalSeniorLoanProgramIILLCSubordinatedNoteInvestmentVehiclesMember" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCSubordinatedNoteInvestmentVehiclesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="us-gaap_CreditFacilityDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdministrativeFeePayable" xlink:to="us-gaap_AdministrativeFeePayable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentCarryingAmount" xlink:to="us-gaap_DebtInstrumentCarryingAmount_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DeferredOfferingCosts" xlink:to="us-gaap_DeferredOfferingCosts_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtWeightedAverageInterestRate" xlink:to="us-gaap_DebtWeightedAverageInterestRate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PercentageOfOutstandingSharesTheCompanyOfferedToRepurchase" xlink:to="ck0001899017_PercentageOfOutstandingSharesTheCompanyOfferedToRepurchase_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_HlrsHoldcoLimitedMember" xlink:to="ck0001899017_HlrsHoldcoLimitedMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InterestExpenseRelatedToHedgedItems" xlink:to="ck0001899017_InterestExpenseRelatedToHedgedItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PinnacleAcquisitionLLCMember" xlink:to="ck0001899017_PinnacleAcquisitionLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_CounterpartyNameAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskTypeDomain" xlink:to="us-gaap_ConcentrationRiskTypeDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnusedCommitmentsToExtendCredit" xlink:to="us-gaap_UnusedCommitmentsToExtendCredit_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputTypeDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentAcquisitionDate" xlink:to="us-gaap_InvestmentAcquisitionDate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIssuerAffiliationExtensibleEnumeration" xlink:to="us-gaap_InvestmentIssuerAffiliationExtensibleEnumeration_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentOwnedAtCost" xlink:to="us-gaap_InvestmentOwnedAtCost_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_MeteorUKBidcoLimitedMember" xlink:to="ck0001899017_MeteorUKBidcoLimitedMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_LineOfCreditFacilityCurrentBorrowingCapacityRegardingProvisionToPermitIncreasesOfTermAndRevolvingCommitments" xlink:to="ck0001899017_LineOfCreditFacilityCurrentBorrowingCapacityRegardingProvisionToPermitIncreasesOfTermAndRevolvingCommitments_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ServicesConsumerMember" xlink:to="ck0001899017_ServicesConsumerMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SubstantialHoldcoLimitedMember" xlink:to="ck0001899017_SubstantialHoldcoLimitedMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EarlyRepurchaseDeductionValue" xlink:to="ck0001899017_EarlyRepurchaseDeductionValue_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestPaidNet" xlink:to="us-gaap_InterestPaidNet_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeMember" xlink:to="srt_RangeMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FoyleBidcoLimitedMember" xlink:to="ck0001899017_FoyleBidcoLimitedMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentPeriodEndDate" xlink:to="dei_DocumentPeriodEndDate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ForPeriodFromThreeMonthAnniversaryOfClosingDateToFacilitiesEndDateMember" xlink:to="ck0001899017_ForPeriodFromThreeMonthAnniversaryOfClosingDateToFacilitiesEndDateMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract" xlink:to="us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ManagementAndServiceFeesBaseRate" xlink:to="us-gaap_ManagementAndServiceFeesBaseRate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_IcfrAuditorAttestationFlag" xlink:to="dei_IcfrAuditorAttestationFlag_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveOneMember" xlink:to="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveOneMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CommonClassSMember" xlink:to="ck0001899017_CommonClassSMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_MonarchFincoLLCMember" xlink:to="ck0001899017_MonarchFincoLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="us-gaap_InvestmentIssuerAffiliationAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EraIndustriesLlcMember" xlink:to="ck0001899017_EraIndustriesLlcMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_StatementOfFinancialPositionAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:to="ck0001899017_SmbcRevolvingCreditFacilityMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EasyIceMember" xlink:to="ck0001899017_EasyIceMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeRealizedGainLossOperatingBeforeTax" xlink:to="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeRealizedGainLossOperatingBeforeTax_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenueRecognitionPolicyTextBlock" xlink:to="us-gaap_RevenueRecognitionPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionRate" xlink:to="us-gaap_RelatedPartyTransactionRate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherReceivables" xlink:to="us-gaap_OtherReceivables_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_IE" xlink:to="country_IE_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems" xlink:to="cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_HumicAcquisitionHoldingsLLCMember" xlink:to="ck0001899017_HumicAcquisitionHoldingsLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_Liabilities_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentAdviceMember" xlink:to="us-gaap_InvestmentAdviceMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_MediaDiversifiedAndProductionMember" xlink:to="ck0001899017_MediaDiversifiedAndProductionMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock" xlink:to="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SoftcoMember" xlink:to="ck0001899017_SoftcoMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeAssetTypeExtensibleList" xlink:to="us-gaap_DerivativeAssetTypeExtensibleList_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:to="us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RepurchaseRequestDeadlineOnDecemberTenTwoThousandTwentyFiveMember" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnDecemberTenTwoThousandTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FireFinanceMember" xlink:to="ck0001899017_FireFinanceMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EquityInterestMember" xlink:to="ck0001899017_EquityInterestMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ForPeriodFromClosingDateToOneMonthAnniversaryOfClosingDateMember" xlink:to="ck0001899017_ForPeriodFromClosingDateToOneMonthAnniversaryOfClosingDateMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedCash" xlink:to="us-gaap_RestrictedCash_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ClassOneSharesMember" xlink:to="ck0001899017_ClassOneSharesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ForeignExchangeForwardMember" xlink:to="us-gaap_ForeignExchangeForwardMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AccidentCareAllianceHoldcoLLCMember" xlink:to="ck0001899017_AccidentCareAllianceHoldcoLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_VariableRateAxis" xlink:to="us-gaap_VariableRateAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendIncomeOperatingPaidInCash" xlink:to="us-gaap_DividendIncomeOperatingPaidInCash_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:to="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ETechGroupMember" xlink:to="ck0001899017_ETechGroupMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityFileNumber" xlink:to="dei_EntityFileNumber_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax" xlink:to="us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncentiveFeeExpenseCapitalGainBased" xlink:to="us-gaap_IncentiveFeeExpenseCapitalGainBased_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ProfessionalFeesAndOperatingExpenses" xlink:to="ck0001899017_ProfessionalFeesAndOperatingExpenses_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:to="us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CoverAbstract" xlink:to="dei_CoverAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation" xlink:to="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeUnrealizedGainLossOperatingBeforeTax" xlink:to="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeUnrealizedGainLossOperatingBeforeTax_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_LU" xlink:to="country_LU_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CorePowerYogaLLCMember" xlink:to="ck0001899017_CorePowerYogaLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_NonQualifyingAssetsPercentageOfTotalAsset" xlink:to="ck0001899017_NonQualifyingAssetsPercentageOfTotalAsset_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputTypeAxis" xlink:to="us-gaap_MeasurementInputTypeAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDistributionDate" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDistributionDate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubordinatedDebtMember" xlink:to="us-gaap_SubordinatedDebtMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RepurchaseRequestDeadlineOnMarchThreeTwoThousandTwentyFiveMember" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnMarchThreeTwoThousandTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_InvestmentTypeCategorizationMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OffsettingAssetsLineItems" xlink:to="us-gaap_OffsettingAssetsLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeGainLossOnDerivativeNet" xlink:to="us-gaap_DerivativeGainLossOnDerivativeNet_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_VaticaHealthIncMember" xlink:to="ck0001899017_VaticaHealthIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="srt_ScenarioUnspecifiedDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_NetAssetAndLiabilitiesPerShare" xlink:to="ck0001899017_NetAssetAndLiabilitiesPerShare_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TermBenchmarkLoanMember" xlink:to="ck0001899017_TermBenchmarkLoanMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NumberOfOperatingSegments" xlink:to="us-gaap_NumberOfOperatingSegments_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_HighTechIndustriesMember" xlink:to="ck0001899017_HighTechIndustriesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FiduciaireJean-MarcFaberFJMFMember" xlink:to="ck0001899017_FiduciaireJean-MarcFaberFJMFMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AlternativeInvestmentMeasurementInput" xlink:to="us-gaap_AlternativeInvestmentMeasurementInput_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset" xlink:to="us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" xlink:to="us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AlertSRCNewcoMember" xlink:to="ck0001899017_AlertSRCNewcoMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt" xlink:to="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure" xlink:to="ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DividendsDeclaredTableTextBlock" xlink:to="us-gaap_DividendsDeclaredTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_SubsequentEventTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ElectronicMerchantSystemsLlcMember" xlink:to="ck0001899017_ElectronicMerchantSystemsLlcMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ElevationNewCoLLCMember" xlink:to="ck0001899017_ElevationNewCoLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_StockRepurchaseProgramExpirationDate" xlink:to="srt_StockRepurchaseProgramExpirationDate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers" xlink:to="ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit" xlink:to="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" xlink:to="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AwaydayMember" xlink:to="ck0001899017_AwaydayMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PercentageOfManagingDealerReceiveAFeeOfOfferingProceeds" xlink:to="ck0001899017_PercentageOfManagingDealerReceiveAFeeOfOfferingProceeds_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TartanBidcoPtyLtdMember" xlink:to="ck0001899017_TartanBidcoPtyLtdMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_ScheduleOfInvestmentsTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:to="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BeverageFoodAndTobaccoMember" xlink:to="ck0001899017_BeverageFoodAndTobaccoMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AGSAmericanGlassServicesAcquisitionLLCMember" xlink:to="ck0001899017_AGSAmericanGlassServicesAcquisitionLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity" xlink:to="us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FiftyUSBidcoIncMember" xlink:to="ck0001899017_FiftyUSBidcoIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyDividendDistribution" xlink:to="us-gaap_InvestmentCompanyDividendDistribution_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FacilityAgreementsMember" xlink:to="ck0001899017_FacilityAgreementsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPaidInKindInterest" xlink:to="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPaidInKindInterest_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RelatedPartyTransactionOperatingExpenseRatio" xlink:to="ck0001899017_RelatedPartyTransactionOperatingExpenseRatio_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_MMCLOWH1CreditFacilityMember" xlink:to="ck0001899017_MMCLOWH1CreditFacilityMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ScheduleOfInvestmentByGeographicRegionTableTextBlock" xlink:to="ck0001899017_ScheduleOfInvestmentByGeographicRegionTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FireInsuranceMember" xlink:to="ck0001899017_FireInsuranceMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyPortfolioTurnover" xlink:to="us-gaap_InvestmentCompanyPortfolioTurnover_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInReceivableForInvestmentSold" xlink:to="us-gaap_IncreaseDecreaseInReceivableForInvestmentSold_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RepurchaseAgreementDateOfRepurchase" xlink:to="us-gaap_RepurchaseAgreementDateOfRepurchase_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:to="us-gaap_ProceedsFromIssuanceOfLongTermDebt_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentTypeExtensibleEnumeration" xlink:to="us-gaap_InvestmentTypeExtensibleEnumeration_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PercentageOfShareRepurchases" xlink:to="ck0001899017_PercentageOfShareRepurchases_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense" xlink:to="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock" xlink:to="us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesOutstanding" xlink:to="us-gaap_CommonStockSharesOutstanding_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDeclarationDate" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDeclarationDate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskManagementProcessesIntegratedFlag" xlink:to="cyd_CybersecurityRiskManagementProcessesIntegratedFlag_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentTransitionReport" xlink:to="dei_DocumentTransitionReport_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PMAParentHoldingsLLCMember" xlink:to="ck0001899017_PMAParentHoldingsLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ValuationTechniqueDiscountedCashFlowMember" xlink:to="us-gaap_ValuationTechniqueDiscountedCashFlowMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_LEPCPCo-InvestLPMember" xlink:to="ck0001899017_LEPCPCo-InvestLPMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:to="us-gaap_PaymentsForRepurchaseOfCommonStock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfInvestmentsAbstract" xlink:to="us-gaap_ScheduleOfInvestmentsAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrealizedGainLossOnDerivatives" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_StatementOfCashFlowsAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CurrentFederalTaxExpenseBenefit" xlink:to="us-gaap_CurrentFederalTaxExpenseBenefit_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodValueNewIssues_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ForeignCurrencyTransactionGainLossUnrealizedExcludingInvestmentPriceChangeBeforeTax" xlink:to="us-gaap_ForeignCurrencyTransactionGainLossUnrealizedExcludingInvestmentPriceChangeBeforeTax_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SensortowerMember" xlink:to="ck0001899017_SensortowerMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SubordinatedNotesInInvestmentVehiclesMember" xlink:to="ck0001899017_SubordinatedNotesInInvestmentVehiclesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestRateSwapMember" xlink:to="us-gaap_InterestRateSwapMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:to="us-gaap_StockholdersEquityNoteDisclosureTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:to="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FinancingProviderMember" xlink:to="ck0001899017_FinancingProviderMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncentiveFeePayableCapitalGainBased" xlink:to="us-gaap_IncentiveFeePayableCapitalGainBased_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashHeldInForeignCurrencyAcquisitionCost" xlink:to="us-gaap_CashHeldInForeignCurrencyAcquisitionCost_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AdvancedAircrewAcademyLlcMember" xlink:to="ck0001899017_AdvancedAircrewAcademyLlcMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RepurchaseOfCommonSharesPayable" xlink:to="ck0001899017_RepurchaseOfCommonSharesPayable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CashEquivalentsPercentOfNetAssets" xlink:to="ck0001899017_CashEquivalentsPercentOfNetAssets_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock" xlink:to="cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentTableTextBlock" xlink:to="us-gaap_InvestmentTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:to="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_HGInsightsIncMember" xlink:to="ck0001899017_HGInsightsIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ScheduleOfNetAssetValuePerShareTableTextBlock" xlink:to="ck0001899017_ScheduleOfNetAssetValuePerShareTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_NetIncomeLoss_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BankOfNewYorkMember" xlink:to="ck0001899017_BankOfNewYorkMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeOneMember" xlink:to="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeOneMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ChartbeatMember" xlink:to="ck0001899017_ChartbeatMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentBasisSpreadVariableRate" xlink:to="us-gaap_InvestmentBasisSpreadVariableRate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyNineDecemberTwoThousandTwentyThreeMember" xlink:to="ck0001899017_TwentyNineDecemberTwoThousandTwentyThreeMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FederalIncomeTaxAndOtherTaxRisksMember" xlink:to="ck0001899017_FederalIncomeTaxAndOtherTaxRisksMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentRestrictionStatus" xlink:to="us-gaap_InvestmentRestrictionStatus_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EasyIceLLCMember" xlink:to="ck0001899017_EasyIceLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PercentageOfMinimumUtilizationFee" xlink:to="ck0001899017_PercentageOfMinimumUtilizationFee_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_AssetsAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyTaxBasisIncomeTaxable" xlink:to="us-gaap_InvestmentCompanyTaxBasisIncomeTaxable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SecuritiesTransactionsRevenueRecognitionAndExpensesPolicyPolicyTextBlock" xlink:to="ck0001899017_SecuritiesTransactionsRevenueRecognitionAndExpensesPolicyPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyDistributionLongTermCapitalGain" xlink:to="us-gaap_InvestmentCompanyDistributionLongTermCapitalGain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PolloTropicalMember" xlink:to="ck0001899017_PolloTropicalMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CPKIPCOBuyerLLCSubordinatedDebtMember" xlink:to="ck0001899017_CPKIPCOBuyerLLCSubordinatedDebtMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentFiscalYearFocus" xlink:to="dei_DocumentFiscalYearFocus_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InterestRateFloorTwoMember" xlink:to="ck0001899017_InterestRateFloorTwoMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveOneMember" xlink:to="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveOneMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SubordinatedMember" xlink:to="ck0001899017_SubordinatedMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConcentrationRiskBenchmarkDomain" xlink:to="us-gaap_ConcentrationRiskBenchmarkDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ThirtyAprilTwoThousandAndTwentyFourMember" xlink:to="ck0001899017_ThirtyAprilTwoThousandAndTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RecoupmentOfExpenseSupportMember" xlink:to="ck0001899017_RecoupmentOfExpenseSupportMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CubeMember" xlink:to="ck0001899017_CubeMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeMaturityDates" xlink:to="us-gaap_DerivativeMaturityDates_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyNineFebruaryTwoThousandTwentyFourMember" xlink:to="ck0001899017_TwentyNineFebruaryTwoThousandTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LoansAndLeasesReceivableNonperformingLoanAndLeasePolicy" xlink:to="us-gaap_LoansAndLeasesReceivableNonperformingLoanAndLeasePolicy_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_IncentiveFeeBasedOnIncomeMember" xlink:to="ck0001899017_IncentiveFeeBasedOnIncomeMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RisksRelatingToInvestmentsMember" xlink:to="ck0001899017_RisksRelatingToInvestmentsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementPolicyPolicyTextBlock" xlink:to="us-gaap_FairValueMeasurementPolicyPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyIncomeAndExpenseAbstract" xlink:to="us-gaap_InvestmentCompanyIncomeAndExpenseAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetInvestmentIncome" xlink:to="us-gaap_NetInvestmentIncome_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AGSAmericanServicesInvestmentsLPMember" xlink:to="ck0001899017_AGSAmericanServicesInvestmentsLPMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BCCHGSInvestments2LPMember" xlink:to="ck0001899017_BCCHGSInvestments2LPMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueDisclosuresAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_CA" xlink:to="country_CA_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ElevationNewCoIntermediateLLCMember" xlink:to="ck0001899017_ElevationNewCoIntermediateLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_GovineerSolutionsFkaBlackMountainMember" xlink:to="ck0001899017_GovineerSolutionsFkaBlackMountainMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_NumberOfBorrowers" xlink:to="ck0001899017_NumberOfBorrowers_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyDistributionToShareholdersPerShare" xlink:to="us-gaap_InvestmentCompanyDistributionToShareholdersPerShare_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:to="us-gaap_InvestmentOwnedPercentOfNetAssets_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDueToAffiliates" xlink:to="us-gaap_IncreaseDecreaseInDueToAffiliates_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCredit" xlink:to="us-gaap_LineOfCredit_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyTaxBasisExpenseNotDeductible" xlink:to="us-gaap_InvestmentCompanyTaxBasisExpenseNotDeductible_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeInstrumentRiskAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AssetsFairValueDisclosure" xlink:to="us-gaap_AssetsFairValueDisclosure_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativesPolicyTextBlock" xlink:to="us-gaap_DerivativesPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFairValue" xlink:to="us-gaap_DebtInstrumentFairValue_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_OdysseyBehavioralHealthMember" xlink:to="ck0001899017_OdysseyBehavioralHealthMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ProfessionalFeesAndOtherExpenses" xlink:to="ck0001899017_ProfessionalFeesAndOtherExpenses_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PayableInvestmentPurchase" xlink:to="us-gaap_PayableInvestmentPurchase_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OpenSwapContractIdentifierAxis" xlink:to="us-gaap_OpenSwapContractIdentifierAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_Security12bTitle" xlink:to="dei_Security12bTitle_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_MeasurementInputBookValueMultipleMember" xlink:to="ck0001899017_MeasurementInputBookValueMultipleMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:to="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RestrictedInvestmentsPercentOfNetAssets" xlink:to="us-gaap_RestrictedInvestmentsPercentOfNetAssets_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxDisclosureTextBlock" xlink:to="us-gaap_IncomeTaxDisclosureTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ConstructionBuildingMember" xlink:to="ck0001899017_ConstructionBuildingMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ApprissMember" xlink:to="ck0001899017_ApprissMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PreIncentiveFeeNetInvestmentIncomeLessThanOrEqualToCatchUpAmountMember" xlink:to="ck0001899017_PreIncentiveFeeNetInvestmentIncomeLessThanOrEqualToCatchUpAmountMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyDistributionPolicyTextBlock" xlink:to="us-gaap_InvestmentCompanyDistributionPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_DocumentInformationTable" xlink:to="dei_DocumentInformationTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RetailNextMember" xlink:to="ck0001899017_RetailNextMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PlaskolitePPCIntermediateIILLCMember" xlink:to="ck0001899017_PlaskolitePPCIntermediateIILLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue" xlink:to="ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RetailNextHoldingsIncMember" xlink:to="ck0001899017_RetailNextHoldingsIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_VacationRentalBrandsLlcMember" xlink:to="ck0001899017_VacationRentalBrandsLlcMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_IncomeTaxDisclosureAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ScheduleOfTaxableDistributionsTableTextBlock" xlink:to="ck0001899017_ScheduleOfTaxableDistributionsTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AmendedAndRestatedBylawsDescription" xlink:to="ck0001899017_AmendedAndRestatedBylawsDescription_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnrecognizedTaxBenefits" xlink:to="us-gaap_UnrecognizedTaxBenefits_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities" xlink:to="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PercentageOfOutstandingSharesPurchased" xlink:to="ck0001899017_PercentageOfOutstandingSharesPurchased_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_OwlAcquisitionLLCMember" xlink:to="ck0001899017_OwlAcquisitionLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_LargestInvesteeMember" xlink:to="ck0001899017_LargestInvesteeMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_GB" xlink:to="country_GB_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_GG" xlink:to="country_GG_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentsOwnedExcludingInvestmentsUnobservableInputsNotDeveloped" xlink:to="ck0001899017_InvestmentsOwnedExcludingInvestmentsUnobservableInputsNotDeveloped_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_TradingSymbol" xlink:to="dei_TradingSymbol_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_HedgingAssetsCurrent" xlink:to="us-gaap_HedgingAssetsCurrent_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" xlink:to="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ScheduleOfShareholderServicingAndOrDistributionFeeTableTextBlock" xlink:to="ck0001899017_ScheduleOfShareholderServicingAndOrDistributionFeeTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RisksRelatingToInfectiousDiseasesAndPandemicsMember" xlink:to="ck0001899017_RisksRelatingToInfectiousDiseasesAndPandemicsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ThirtyMayTwoThousandAndTwentyFourMember" xlink:to="ck0001899017_ThirtyMayTwoThousandAndTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:to="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_InvestmentOwnedBalanceAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityExTransitionPeriod" xlink:to="dei_EntityExTransitionPeriod_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit" xlink:to="us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestAndDebtExpense" xlink:to="us-gaap_InterestAndDebtExpense_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage" xlink:to="ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InterestRateFloorEightMember" xlink:to="ck0001899017_InterestRateFloorEightMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SummaryOfAllExpensesSupportedAndRecoupedByTheAdviserTableTextBlock" xlink:to="ck0001899017_SummaryOfAllExpensesSupportedAndRecoupedByTheAdviserTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfTrailingQuarters" xlink:to="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfTrailingQuarters_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueByAssetClassAxis" xlink:to="us-gaap_FairValueByAssetClassAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsTextBlock" xlink:to="us-gaap_InvestmentCompanyFinancialHighlightsTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Investments" xlink:to="us-gaap_Investments_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ForPeriodFromOneMonthAnniversaryOfClosingDateToTwoMonthAnniversaryOfClosingDateMember" xlink:to="ck0001899017_ForPeriodFromOneMonthAnniversaryOfClosingDateToTwoMonthAnniversaryOfClosingDateMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PPTGroupMember" xlink:to="ck0001899017_PPTGroupMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidInsurance" xlink:to="us-gaap_PrepaidInsurance_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare" xlink:to="us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AtsMember" xlink:to="ck0001899017_AtsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdministrativeServiceMember" xlink:to="us-gaap_AdministrativeServiceMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MajorCustomersAxis" xlink:to="srt_MajorCustomersAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets" xlink:to="ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDividendsReceivable" xlink:to="us-gaap_IncreaseDecreaseInDividendsReceivable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentIncomeInterestAndDividend" xlink:to="us-gaap_InvestmentIncomeInterestAndDividend_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentSecuritiesWeightedAverageYield" xlink:to="ck0001899017_InvestmentSecuritiesWeightedAverageYield_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeAssetCounterpartyNameExtensibleList" xlink:to="us-gaap_DerivativeAssetCounterpartyNameExtensibleList_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_MaximumMember" xlink:to="srt_MaximumMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:to="us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DesignatedAsHedgingInstrumentMember" xlink:to="us-gaap_DesignatedAsHedgingInstrumentMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RangeAxis" xlink:to="srt_RangeAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PrepaidExpenseCurrent" xlink:to="us-gaap_PrepaidExpenseCurrent_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FirstLienSeniorSecuredLoanMember" xlink:to="ck0001899017_FirstLienSeniorSecuredLoanMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AmberstoneCo.Ltd.Member" xlink:to="ck0001899017_AmberstoneCo.Ltd.Member_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RetailSectorMember" xlink:to="us-gaap_RetailSectorMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockValue" xlink:to="us-gaap_CommonStockValue_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyDividendDistributionAbstract" xlink:to="us-gaap_InvestmentCompanyDividendDistributionAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInPrepaidInsurance" xlink:to="us-gaap_IncreaseDecreaseInPrepaidInsurance_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityExpirationDate1" xlink:to="us-gaap_LineOfCreditFacilityExpirationDate1_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_LindstromLLCMember" xlink:to="ck0001899017_LindstromLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AgrofreshSolutionsMember" xlink:to="ck0001899017_AgrofreshSolutionsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ConsolidationPolicyTextBlock" xlink:to="us-gaap_ConsolidationPolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyCommittedCapital" xlink:to="us-gaap_InvestmentCompanyCommittedCapital_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PayRangeLLCMember" xlink:to="ck0001899017_PayRangeLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_GeneralRiskFactorsMember" xlink:to="ck0001899017_GeneralRiskFactorsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentNonIncomeProducing" xlink:to="us-gaap_InvestmentNonIncomeProducing_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:to="us-gaap_RelatedPartyTransactionAmountsOfTransaction_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FinancingReceivableNonAccrualNumberOfLoans" xlink:to="ck0001899017_FinancingReceivableNonAccrualNumberOfLoans_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BankingFinanceInsuranceAndRealEstateMember" xlink:to="ck0001899017_BankingFinanceInsuranceAndRealEstateMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:to="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GainLossOnSaleOfDerivatives" xlink:to="us-gaap_GainLossOnSaleOfDerivatives_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RepurchaseRequestDeadlineOnAugustTwentyNineTwoThousandTwentyFiveMember" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnAugustTwentyNineTwoThousandTwentyFiveMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyFinancialRatiosAbstract" xlink:to="us-gaap_InvestmentCompanyFinancialRatiosAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AmortizationOfFinancingCosts" xlink:to="us-gaap_AmortizationOfFinancingCosts_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityPublicFloat" xlink:to="dei_EntityPublicFloat_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable" xlink:to="us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_HeadsUpTechnologiesIncMember" xlink:to="ck0001899017_HeadsUpTechnologiesIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PercentageOfUnderwiringCompensationOnGrossProceedsOfPrimaryOffering" xlink:to="ck0001899017_PercentageOfUnderwiringCompensationOnGrossProceedsOfPrimaryOffering_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ContainersPackagingAndGlassMember" xlink:to="ck0001899017_ContainersPackagingAndGlassMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfDebtTableTextBlock" xlink:to="us-gaap_ScheduleOfDebtTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="country_FR" xlink:to="country_FR_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RelatedPartyTransactionLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_AccountsNotesAndLoansReceivableLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityRegistrantName" xlink:to="dei_EntityRegistrantName_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtDisclosureTextBlock" xlink:to="us-gaap_DebtDisclosureTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ChaseIndustriesIncMember" xlink:to="ck0001899017_ChaseIndustriesIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsSubsidiary" xlink:to="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsSubsidiary_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestExpensePolicyTextBlock" xlink:to="us-gaap_InterestExpensePolicyTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityVoluntaryFilers" xlink:to="dei_EntityVoluntaryFilers_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ForestProductsAndPaperMember" xlink:to="ck0001899017_ForestProductsAndPaperMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate" xlink:to="ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OtherNonoperatingIncomeExpense" xlink:to="us-gaap_OtherNonoperatingIncomeExpense_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AdditionalPaidInCapital" xlink:to="us-gaap_AdditionalPaidInCapital_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SubsequentEventsAbstract" xlink:to="us-gaap_SubsequentEventsAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag" xlink:to="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ElectronicMerchantSystemsMember" xlink:to="ck0001899017_ElectronicMerchantSystemsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:to="us-gaap_InvestmentAffiliatedIssuerControlledMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" xlink:to="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeVariableInterestRate" xlink:to="us-gaap_DerivativeVariableInterestRate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PurchasePrice" xlink:to="ck0001899017_PurchasePrice_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_VesscoMidcoHoldingsLlcMember" xlink:to="ck0001899017_VesscoMidcoHoldingsLlcMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentPercentOfPortfolioFairValue" xlink:to="ck0001899017_InvestmentPercentOfPortfolioFairValue_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockRepurchasedDuringPeriodValue" xlink:to="us-gaap_StockRepurchasedDuringPeriodValue_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:to="us-gaap_ProceedsFromIssuanceOfCommonStock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CostsAndExpensesAbstract" xlink:to="us-gaap_CostsAndExpensesAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AdvancedAircrewMember" xlink:to="ck0001899017_AdvancedAircrewMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityCommonStockSharesOutstanding" xlink:to="dei_EntityCommonStockSharesOutstanding_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SubAdministratorMember" xlink:to="ck0001899017_SubAdministratorMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityPeriodIncreaseDecrease" xlink:to="us-gaap_StockholdersEquityPeriodIncreaseDecrease_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InterestAndDividendIncomeOperatingPaidInKind" xlink:to="us-gaap_InterestAndDividendIncomeOperatingPaidInKind_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetAssetValuePerShare" xlink:to="us-gaap_NetAssetValuePerShare_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyExpenseRatioIncludingVoluntaryFeeWaiver" xlink:to="us-gaap_InvestmentCompanyExpenseRatioIncludingVoluntaryFeeWaiver_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyFinancialHighlightsLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_Assets" xlink:to="us-gaap_Assets_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedCapitalLossCarryforward" xlink:to="us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedCapitalLossCarryforward_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDateOfRecord" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDateOfRecord_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_IncomeStatementAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeLiabilityFairValueOfCollateral" xlink:to="us-gaap_DerivativeLiabilityFairValueOfCollateral_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SpindriftMember" xlink:to="ck0001899017_SpindriftMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FactsGlobalEnergyMember" xlink:to="ck0001899017_FactsGlobalEnergyMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_WeightedAverageMember" xlink:to="srt_WeightedAverageMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncreaseDecreaseInDerivativeAssets" xlink:to="us-gaap_IncreaseDecreaseInDerivativeAssets_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EquityMethodInvestmentSoldCarryingAmount" xlink:to="us-gaap_EquityMethodInvestmentSoldCarryingAmount_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_LegacyCorporateLendingHoldcoLlcPreferredEquityMember" xlink:to="ck0001899017_LegacyCorporateLendingHoldcoLlcPreferredEquityMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:to="us-gaap_StockIssuedDuringPeriodSharesNewIssues_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_MediaAdvertisingPrintingAndPublishingMember" xlink:to="ck0001899017_MediaAdvertisingPrintingAndPublishingMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TotalSeniorSecuritiesMember" xlink:to="ck0001899017_TotalSeniorSecuritiesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EarningsPerShareDiluted" xlink:to="us-gaap_EarningsPerShareDiluted_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_CityAreaCode" xlink:to="dei_CityAreaCode_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InterestRateFloorFourMember" xlink:to="ck0001899017_InterestRateFloorFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AuditorName" xlink:to="dei_AuditorName_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LongTermDebtMaturingInYearsFourAndFive" xlink:to="us-gaap_LongTermDebtMaturingInYearsFourAndFive_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xlink:to="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_GaleriaMember" xlink:to="ck0001899017_GaleriaMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DebtInstrumentFaceAmount" xlink:to="us-gaap_DebtInstrumentFaceAmount_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ServicesBusinessMember" xlink:to="ck0001899017_ServicesBusinessMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EarningsBeforeInterestTaxDepreciationAndAmortizationOfMiddleMarketCompanies" xlink:to="ck0001899017_EarningsBeforeInterestTaxDepreciationAndAmortizationOfMiddleMarketCompanies_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EnduranceHoldcoLimitedMember" xlink:to="ck0001899017_EnduranceHoldcoLimitedMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AllworthFinancialGroupLpMember" xlink:to="ck0001899017_AllworthFinancialGroupLpMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:to="us-gaap_DerivativeFairValueOfDerivativeLiability_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardDateAxis" xlink:to="us-gaap_AwardDateAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentsAbstract" xlink:to="us-gaap_InvestmentsAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentOnVehiclesMember" xlink:to="ck0001899017_InvestmentOnVehiclesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AMIMember" xlink:to="ck0001899017_AMIMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EheHealthMember" xlink:to="ck0001899017_EheHealthMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_StockRepurchaseProgramMonthlyRedemptionsPercentOfNetAssetValueMaximum" xlink:to="ck0001899017_StockRepurchaseProgramMonthlyRedemptionsPercentOfNetAssetValueMaximum_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AwardDateDomain" xlink:to="us-gaap_AwardDateDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_DiscoverySeniorLivingMember" xlink:to="ck0001899017_DiscoverySeniorLivingMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TrancheANotesMember" xlink:to="ck0001899017_TrancheANotesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ApolloIntelligenceMember" xlink:to="ck0001899017_ApolloIntelligenceMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_IncentiveFeesVoluntarilyWaived" xlink:to="ck0001899017_IncentiveFeesVoluntarilyWaived_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_HotelGamingAndLeisureMember" xlink:to="ck0001899017_HotelGamingAndLeisureMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashAndCashEquivalentsAxis" xlink:to="us-gaap_CashAndCashEquivalentsAxis_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RedMedOperationsCollageRehabilitationMember" xlink:to="ck0001899017_RedMedOperationsCollageRehabilitationMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SeventeenJulyTwoThousandAndTwentyFourMember" xlink:to="ck0001899017_SeventeenJulyTwoThousandAndTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SubordinatedDebtBasisSpreadVariableRate" xlink:to="ck0001899017_SubordinatedDebtBasisSpreadVariableRate_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfStockIssuanceCosts" xlink:to="us-gaap_PaymentsOfStockIssuanceCosts_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueInputsLevel1Member" xlink:to="us-gaap_FairValueInputsLevel1Member_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ClassOfStockLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NotesPayable" xlink:to="us-gaap_NotesPayable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ShortTermDebtLineItems" xlink:to="us-gaap_ShortTermDebtLineItems_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_UnreimbursedExpenseSupportMember" xlink:to="ck0001899017_UnreimbursedExpenseSupportMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_UnamortizedDebtIssuanceExpense" xlink:to="us-gaap_UnamortizedDebtIssuanceExpense_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AuditorLocation" xlink:to="dei_AuditorLocation_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_MetalsAndMiningMember" xlink:to="ck0001899017_MetalsAndMiningMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ManagementFeePayable" xlink:to="us-gaap_ManagementFeePayable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentVehiclesMember" xlink:to="ck0001899017_InvestmentVehiclesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_DerivativeContractTypeDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyThreeAugustTwoThousandAndTwentyFourMember" xlink:to="ck0001899017_TwentyThreeAugustTwoThousandAndTwentyFourMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentsOperationsMember" xlink:to="ck0001899017_InvestmentsOperationsMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_VesscoWaterMember" xlink:to="ck0001899017_VesscoWaterMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityInteractiveDataCurrent" xlink:to="dei_EntityInteractiveDataCurrent_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ReceivedPurchaseOrders" xlink:to="ck0001899017_ReceivedPurchaseOrders_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_HempzMember" xlink:to="ck0001899017_HempzMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_IncomeStatementLocationDomain" xlink:to="us-gaap_IncomeStatementLocationDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ConcessionsDevelopmentGroupLLCMember" xlink:to="ck0001899017_ConcessionsDevelopmentGroupLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_Series2025SeniorNotesMember" xlink:to="ck0001899017_Series2025SeniorNotesMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CRHHealthcarePurchaserIncMember" xlink:to="ck0001899017_CRHHealthcarePurchaserIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CityBarbequeLlcMember" xlink:to="ck0001899017_CityBarbequeLlcMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SaturnPurchaserCorpMember" xlink:to="ck0001899017_SaturnPurchaserCorpMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfTreasuryStockByClassTextBlock" xlink:to="us-gaap_ScheduleOfTreasuryStockByClassTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CashEquivalentsAtCarryingValue" xlink:to="us-gaap_CashEquivalentsAtCarryingValue_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:to="us-gaap_InvestmentCompanyFinancialHighlightsTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockDividendsPerShareDeclared" xlink:to="us-gaap_CommonStockDividendsPerShareDeclared_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:to="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_HellersMember" xlink:to="ck0001899017_HellersMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityTaxIdentificationNumber" xlink:to="dei_EntityTaxIdentificationNumber_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_RevenuesAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_ConsumerSectorDurableMember" xlink:to="ck0001899017_ConsumerSectorDurableMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SONIAPlusSixPointThreeEightPercentageMember" xlink:to="ck0001899017_SONIAPlusSixPointThreeEightPercentageMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:to="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AmountOfExpenseSupportMember" xlink:to="ck0001899017_AmountOfExpenseSupportMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_WholesaleMember" xlink:to="ck0001899017_WholesaleMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_CatchUpAmountPercentMultipliedToNav" xlink:to="ck0001899017_CatchUpAmountPercentMultipliedToNav_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ProceedsFromIssuanceOrSaleOfEquity" xlink:to="us-gaap_ProceedsFromIssuanceOrSaleOfEquity_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_LocalPhoneNumber" xlink:to="dei_LocalPhoneNumber_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="us-gaap_RelatedPartyTransactionDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_AvalonBidcoLimitedMember" xlink:to="ck0001899017_AvalonBidcoLimitedMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveOneMember" xlink:to="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveOneMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_GrossInvestmentIncomeOperating" xlink:to="us-gaap_GrossInvestmentIncomeOperating_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_AuditorOpinionTextBlock" xlink:to="dei_AuditorOpinionTextBlock_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement" xlink:to="us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_PaymentsOfFinancingCosts" xlink:to="us-gaap_PaymentsOfFinancingCosts_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_MeasurementInputRevenueMultipleMember" xlink:to="us-gaap_MeasurementInputRevenueMultipleMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_AccountingPoliciesAbstract_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BcsfAdvisorsLpMember" xlink:to="ck0001899017_BcsfAdvisorsLpMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:to="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAccretionAmortizationOfDiscountPremium" xlink:to="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAccretionAmortizationOfDiscountPremium_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_RNEnterprisesLLCMember" xlink:to="ck0001899017_RNEnterprisesLLCMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_PreIncentiveFeeNetInvestmentIncomeEqualToLessThanCatchUpAmountMember" xlink:to="ck0001899017_PreIncentiveFeeNetInvestmentIncomeEqualToLessThanCatchUpAmountMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EURIBORPlusSixPointTwoFivePercentageMember" xlink:to="ck0001899017_EURIBORPlusSixPointTwoFivePercentageMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_TrancheBMember" xlink:to="ck0001899017_TrancheBMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_InvestmentCompanyContractualFeeWaived" xlink:to="us-gaap_InvestmentCompanyContractualFeeWaived_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_InvestmentUnfundedCommitments" xlink:to="ck0001899017_InvestmentUnfundedCommitments_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="us-gaap_ClassOfStockDomain_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_WUHoldcoIncMember" xlink:to="ck0001899017_WUHoldcoIncMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="srt_AffiliatedEntityMember" xlink:to="srt_AffiliatedEntityMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_ScheduleOfStockByClassTable_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="us-gaap_CommonStockSharesAuthorizedUnlimited" xlink:to="us-gaap_CommonStockSharesAuthorizedUnlimited_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EnvironmentalIndustriesSectorMember" xlink:to="ck0001899017_EnvironmentalIndustriesSectorMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="dei_EntityEmergingGrowthCompany" xlink:to="dei_EntityEmergingGrowthCompany_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BankBillSwapBidRateBBSYMember" xlink:to="ck0001899017_BankBillSwapBidRateBBSYMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EuroInterbankOfferedRateEuriborMember" xlink:to="ck0001899017_EuroInterbankOfferedRateEuriborMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BankBillBenchmarkRateMember" xlink:to="ck0001899017_BankBillBenchmarkRateMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_FireFinanceControlledAffiliateMember" xlink:to="ck0001899017_FireFinanceControlledAffiliateMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_SterlingOvernightIndexAverageMember" xlink:to="ck0001899017_SterlingOvernightIndexAverageMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_BankBillSwapBidRateMember" xlink:to="ck0001899017_BankBillSwapBidRateMember_lbl"/>
          <link:labelArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/concept-label" xlink:from="ck0001899017_EuroInterbankOfferedRateMember" xlink:to="ck0001899017_EuroInterbankOfferedRateMember_lbl"/>
        </link:labelLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DocumentDocumentAndEntityInformation" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems" xlink:label="dei_DocumentInformationLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="dei_DocumentType"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationTable" xlink:label="dei_DocumentInformationTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassSMember" xlink:label="ck0001899017_CommonClassSMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentAnnualReport" xlink:label="dei_DocumentAnnualReport"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassDMember" xlink:label="ck0001899017_CommonClassDMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentQuarterlyReport" xlink:label="dei_DocumentQuarterlyReport"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassIMember" xlink:label="ck0001899017_CommonClassIMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport" xlink:label="dei_DocumentTransitionReport"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber" xlink:label="dei_EntityFileNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="dei_EntityIncorporationStateCountryCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber" xlink:label="dei_EntityTaxIdentificationNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince" xlink:label="dei_EntityAddressStateOrProvince"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1" xlink:label="dei_EntityAddressAddressLine1"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine2" xlink:label="dei_EntityAddressAddressLine2"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown" xlink:label="dei_EntityAddressCityOrTown"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode" xlink:label="dei_EntityAddressPostalZipCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode" xlink:label="dei_CityAreaCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber" xlink:label="dei_LocalPhoneNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle" xlink:label="dei_Security12bTitle"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName" xlink:label="dei_SecurityExchangeName"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="dei_EntityWellKnownSeasonedIssuer"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityVoluntaryFilers" xlink:label="dei_EntityVoluntaryFilers"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus" xlink:label="dei_EntityCurrentReportingStatus"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent" xlink:label="dei_EntityInteractiveDataCurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitySmallBusiness" xlink:label="dei_EntitySmallBusiness"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityExTransitionPeriod" xlink:label="dei_EntityExTransitionPeriod"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_IcfrAuditorAttestationFlag" xlink:label="dei_IcfrAuditorAttestationFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany" xlink:label="dei_EntityShellCompany"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityPublicFloat" xlink:label="dei_EntityPublicFloat"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="dei_EntityCommonStockSharesOutstanding"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFinStmtErrorCorrectionFlag" xlink:label="dei_DocumentFinStmtErrorCorrectionFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentsIncorporatedByReferenceTextBlock" xlink:label="dei_DocumentsIncorporatedByReferenceTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorName" xlink:label="dei_AuditorName"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorLocation" xlink:label="dei_AuditorLocation"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorFirmId" xlink:label="dei_AuditorFirmId"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorOpinionTextBlock" xlink:label="dei_AuditorOpinionTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CoverAbstract" xlink:label="dei_CoverAbstract"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentType" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationTable" xlink:to="us-gaap_StatementClassOfStockAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassSMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentAnnualReport" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationTable" xlink:to="dei_DocumentInformationLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassDMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentQuarterlyReport" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassIMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentTransitionReport" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityFileNumber" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentPeriodEndDate" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityRegistrantName" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityIncorporationStateCountryCode" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityTaxIdentificationNumber" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressStateOrProvince" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressAddressLine1" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressAddressLine2" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressCityOrTown" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressPostalZipCode" order="13" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_CityAreaCode" order="14" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_LocalPhoneNumber" order="15" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_Security12bTitle" order="16" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_TradingSymbol" order="17" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_SecurityExchangeName" order="18" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityWellKnownSeasonedIssuer" order="19" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityVoluntaryFilers" order="20" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityCurrentReportingStatus" order="21" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityInteractiveDataCurrent" order="22" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityFilerCategory" order="23" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntitySmallBusiness" order="24" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityEmergingGrowthCompany" order="25" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityExTransitionPeriod" order="26" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_IcfrAuditorAttestationFlag" order="27" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityShellCompany" order="28" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityPublicFloat" order="29" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityCommonStockSharesOutstanding" order="30" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityCentralIndexKey" order="31" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_CurrentFiscalYearEndDate" order="32" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentFiscalYearFocus" order="33" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentFiscalPeriodFocus" order="34" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AmendmentFlag" order="35" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentFinStmtErrorCorrectionFlag" order="36" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentsIncorporatedByReferenceTextBlock" order="37" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AuditorName" order="38" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AuditorLocation" order="39" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AuditorFirmId" order="40" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AuditorOpinionTextBlock" order="41" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="dei_CoverAbstract" xlink:to="dei_DocumentInformationTable" order="49.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfAssetsAndLiabilities1" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationAxis" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="us-gaap_StockholdersEquityAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAbstract" xlink:label="us-gaap_LiabilitiesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:label="us-gaap_InvestmentUnaffiliatedIssuerMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalanceAbstract" xlink:label="us-gaap_InvestmentOwnedBalanceAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_AffiliatedEntityMember" xlink:label="srt_AffiliatedEntityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="us-gaap_AdditionalPaidInCapital"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionPayable" xlink:label="us-gaap_DistributionPayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="us-gaap_CommitmentsAndContingencies"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerControlledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashHeldInForeignCurrency" xlink:label="us-gaap_CashHeldInForeignCurrency"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayable" xlink:label="us-gaap_IncentiveFeePayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeCollateralRightToReclaimCash" xlink:label="us-gaap_DerivativeCollateralRightToReclaimCash"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayableIncomeBased" xlink:label="us-gaap_IncentiveFeePayableIncomeBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalents" xlink:label="us-gaap_RestrictedCashAndCashEquivalents"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNet" xlink:label="us-gaap_AssetsNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayableCapitalGainBased" xlink:label="us-gaap_IncentiveFeePayableCapitalGainBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingAssetsCurrent" xlink:label="us-gaap_HedgingAssetsCurrent"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NetAssetCommonStockValue" xlink:label="ck0001899017_NetAssetCommonStockValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseOfCommonSharesPayable" xlink:label="ck0001899017_RepurchaseOfCommonSharesPayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="us-gaap_DeferredFinanceCostsNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetAssetValuePerShare" xlink:label="us-gaap_NetAssetValuePerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementFeePayable" xlink:label="us-gaap_ManagementFeePayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestReceivable" xlink:label="us-gaap_InterestReceivable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:label="us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsReceivable" xlink:label="us-gaap_DividendsReceivable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilities" xlink:label="us-gaap_DerivativeLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssets" xlink:label="us-gaap_DerivativeAssets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PayableInvestmentPurchase" xlink:label="us-gaap_PayableInvestmentPurchase"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableInvestmentSale" xlink:label="us-gaap_ReceivableInvestmentSale"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidInsurance" xlink:label="us-gaap_PrepaidInsurance"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PrepaidFinancingCosts" xlink:label="ck0001899017_PrepaidFinancingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherReceivables" xlink:label="us-gaap_OtherReceivables"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_InvestmentIssuerAffiliationAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_AssetsAbstract" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_CommonStockValue" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_LongTermDebt" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentUnaffiliatedIssuerMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="us-gaap_InvestmentIssuerAffiliationDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_StatementTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_InvestmentOwnedBalanceAbstract" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="srt_AffiliatedEntityMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_InvestmentOwnedAtFairValue" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_LiabilitiesAbstract" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_AdditionalPaidInCapital" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_DistributionPayable" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_CommitmentsAndContingencies" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_InterestPayableCurrentAndNoncurrent" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerControlledMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_CashHeldInForeignCurrency" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StockholdersEquityAbstract" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquity" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_IncentiveFeePayable" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_DerivativeCollateralRightToReclaimCash" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_IncentiveFeePayableIncomeBased" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_RestrictedCashAndCashEquivalents" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_AssetsNet" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_IncentiveFeePayableCapitalGainBased" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_HedgingAssetsCurrent" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems" xlink:to="ck0001899017_NetAssetCommonStockValue" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="ck0001899017_RepurchaseOfCommonSharesPayable" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_DeferredFinanceCostsNet" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_NetAssetValuePerShare" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_ManagementFeePayable" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_InterestReceivable" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_AccruedLiabilitiesAndOtherLiabilities" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_DividendsReceivable" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_DerivativeLiabilities" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_DerivativeAssets" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_PayableInvestmentPurchase" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_ReceivableInvestmentSale" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_Liabilities" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_PrepaidInsurance" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="ck0001899017_PrepaidFinancingCosts" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_OtherReceivables" order="13" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_Assets" order="14" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfAssetsAndLiabilitiesParenthetical" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationAxis" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassOneSharesMember" xlink:label="ck0001899017_ClassOneSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashHeldInForeignCurrencyAcquisitionCost" xlink:label="us-gaap_CashHeldInForeignCurrencyAcquisitionCost"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:label="us-gaap_InvestmentUnaffiliatedIssuerMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetTypeExtensibleList" xlink:label="us-gaap_DerivativeAssetTypeExtensibleList"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerControlledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedAmortizationDeferredFinanceCosts" xlink:label="us-gaap_AccumulatedAmortizationDeferredFinanceCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentUnamortizedDiscount" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesAuthorizedUnlimited" xlink:label="us-gaap_CommonStockSharesAuthorizedUnlimited"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/netLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="us-gaap_InvestmentIssuerAffiliationDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_ScheduleOfInvestmentsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentIssuerAffiliationAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassOneSharesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_CashHeldInForeignCurrencyAcquisitionCost" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentUnaffiliatedIssuerMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_StatementClassOfStockAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeAssetTypeExtensibleList" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerControlledMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_ScheduleOfInvestmentsLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_AccumulatedAmortizationDeferredFinanceCosts" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscount" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_CommonStockSharesAuthorizedUnlimited" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_CommonStockSharesIssued" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_CommonStockSharesOutstanding" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfOperations" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationAxis" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuesAbstract" xlink:label="us-gaap_RevenuesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:label="us-gaap_RealizedInvestmentGainsLossesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="us-gaap_RealizedInvestmentGainsLosses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:label="us-gaap_InvestmentUnaffiliatedIssuerMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementAbstract" xlink:label="us-gaap_IncomeStatementAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:label="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeOperatingPaidInCash" xlink:label="us-gaap_InterestIncomeOperatingPaidInCash"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossRealized" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossRealized"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeeExpenseIncomeBased" xlink:label="us-gaap_IncentiveFeeExpenseIncomeBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendIncomeOperatingPaidInCash" xlink:label="us-gaap_DividendIncomeOperatingPaidInCash"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetInvestmentIncome" xlink:label="us-gaap_NetInvestmentIncome"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt" xlink:label="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerControlledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeeExpenseCapitalGainBased" xlink:label="us-gaap_IncentiveFeeExpenseCapitalGainBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDividendIncomeOperatingPaidInKind" xlink:label="us-gaap_InterestAndDividendIncomeOperatingPaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:label="us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSaleOfDerivatives" xlink:label="us-gaap_GainLossOnSaleOfDerivatives"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ProfessionalFeesAndOperatingExpenses" xlink:label="ck0001899017_ProfessionalFeesAndOperatingExpenses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherIncome" xlink:label="us-gaap_OtherIncome"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:label="us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementFeeExpense" xlink:label="us-gaap_ManagementFeeExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossInvestmentIncomeOperating" xlink:label="us-gaap_GrossInvestmentIncomeOperating"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax" xlink:label="ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfDeferredCharges" xlink:label="us-gaap_AmortizationOfDeferredCharges"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeOperating" xlink:label="us-gaap_InterestIncomeOperating"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TrusteeFees" xlink:label="us-gaap_TrusteeFees"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" xlink:label="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OrganizationCosts" xlink:label="ck0001899017_OrganizationCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:label="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherGeneralAndAdministrativeExpense" xlink:label="us-gaap_OtherGeneralAndAdministrativeExpense"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" xlink:label="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyContractualFeeWaived" xlink:label="us-gaap_InvestmentCompanyContractualFeeWaived"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyVoluntaryFeeWaived" xlink:label="us-gaap_InvestmentCompanyVoluntaryFeeWaived"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyExpenseRecoupmentSupport" xlink:label="ck0001899017_InvestmentCompanyExpenseRecoupmentSupport"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement" xlink:label="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_InvestmentIssuerAffiliationAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_RevenuesAbstract" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_RealizedInvestmentGainsLosses" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentUnaffiliatedIssuerMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="us-gaap_InvestmentIssuerAffiliationDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementAbstract" xlink:to="us-gaap_StatementTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_InterestExpense" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_InterestIncomeOperatingPaidInCash" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_StatementLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_ForeignCurrencyTransactionGainLossRealized" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_IncentiveFeeExpenseIncomeBased" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_DividendIncomeOperatingPaidInCash" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_NetInvestmentIncome" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerControlledMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_IncentiveFeeExpenseCapitalGainBased" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_InterestAndDividendIncomeOperatingPaidInKind" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_GainLossOnSaleOfDerivatives" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="ck0001899017_ProfessionalFeesAndOperatingExpenses" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_OtherIncome" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_ManagementFeeExpense" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_GrossInvestmentIncomeOperating" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_RealizedInvestmentGainsLossesAbstract" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_AmortizationOfDeferredCharges" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_InterestIncomeOperating" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_NetIncomeLoss" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_TrusteeFees" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="ck0001899017_OrganizationCosts" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_OtherGeneralAndAdministrativeExpense" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_InvestmentCompanyContractualFeeWaived" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_InvestmentCompanyVoluntaryFeeWaived" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="ck0001899017_InvestmentCompanyExpenseRecoupmentSupport" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement" order="13" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfChangesInNetAssets" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract" xlink:label="us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract" xlink:label="us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfStockholdersEquityAbstract" xlink:label="us-gaap_StatementOfStockholdersEquityAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyIncomeAndExpenseAbstract" xlink:label="us-gaap_InvestmentCompanyIncomeAndExpenseAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDividendDistributionAbstract" xlink:label="us-gaap_InvestmentCompanyDividendDistributionAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityPeriodIncreaseDecrease" xlink:label="us-gaap_StockholdersEquityPeriodIncreaseDecrease"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingAfterTax" xlink:label="us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingAfterTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDividendDistribution" xlink:label="us-gaap_InvestmentCompanyDividendDistribution"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:label="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax" xlink:label="us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction" xlink:label="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract" xlink:to="us-gaap_StockIssuedDuringPeriodValueNewIssues" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract" xlink:to="us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="us-gaap_InvestmentCompanyIncomeAndExpenseAbstract" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyIncomeAndExpenseAbstract" xlink:to="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyDividendDistributionAbstract" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:to="us-gaap_StockholdersEquityPeriodIncreaseDecrease" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract" xlink:to="us-gaap_StockRepurchasedDuringPeriodValue" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedTerseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="us-gaap_InvestmentCompanyDividendDistributionAbstract" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyIncomeAndExpenseAbstract" xlink:to="us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingAfterTax" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyDividendDistributionAbstract" xlink:to="us-gaap_InvestmentCompanyDividendDistribution" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedTotalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract" xlink:to="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="us-gaap_InvestmentCompanyCapitalShareTransactionsAbstract" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyIncomeAndExpenseAbstract" xlink:to="us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest_2" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyCapitalShareTransactionsStockIssuedAbstract" xlink:to="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfStockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAbstract" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyIncomeAndExpenseAbstract" xlink:to="us-gaap_NetIncomeLoss" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity" xlink:label="us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SupplementalCashFlowInformationAbstract" xlink:label="us-gaap_SupplementalCashFlowInformationAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPaidNet" xlink:label="us-gaap_InterestPaidNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfCashFlowsAbstract" xlink:label="us-gaap_StatementOfCashFlowsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss" xlink:label="us-gaap_ProfitLoss"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity" xlink:label="us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxesPaidNet" xlink:label="us-gaap_IncomeTaxesPaidNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="us-gaap_RepaymentsOfLongTermDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInReceivableForInvestmentSold" xlink:label="us-gaap_IncreaseDecreaseInReceivableForInvestmentSold"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReinvestmentOfDividends" xlink:label="ck0001899017_ReinvestmentOfDividends"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfFinancingCosts" xlink:label="us-gaap_PaymentsOfFinancingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfStockIssuanceCosts" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="us-gaap_AmortizationOfFinancingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfDeferredCharges" xlink:label="us-gaap_AmortizationOfDeferredCharges"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="us-gaap_RealizedInvestmentGainsLosses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_6"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDividends" xlink:label="us-gaap_PaymentsOfDividends"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossRealized" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossRealized"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt" xlink:label="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" xlink:label="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCash" xlink:label="us-gaap_RestrictedCash"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossUnrealizedExcludingInvestmentPriceChangeBeforeTax" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossUnrealizedExcludingInvestmentPriceChangeBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CashAndCashEquivalentsHeldInForeignCurrency" xlink:label="ck0001899017_CashAndCashEquivalentsHeldInForeignCurrency"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeUnrealizedGainLossOperatingBeforeTax" xlink:label="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeUnrealizedGainLossOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_11"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDerivativeAssets" xlink:label="us-gaap_IncreaseDecreaseInDerivativeAssets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:label="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDividendsReceivable" xlink:label="us-gaap_IncreaseDecreaseInDividendsReceivable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInTradingLiabilities" xlink:label="us-gaap_IncreaseDecreaseInTradingLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidInsurance" xlink:label="us-gaap_IncreaseDecreaseInPrepaidInsurance"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_IncreaseDecreaseInPrepaidFinancingCosts" xlink:label="ck0001899017_IncreaseDecreaseInPrepaidFinancingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherReceivables" xlink:label="us-gaap_IncreaseDecreaseInOtherReceivables"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDueToAffiliates" xlink:label="us-gaap_IncreaseDecreaseInDueToAffiliates"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:label="us-gaap_IncreaseDecreaseInInterestPayableNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased" xlink:label="us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased" xlink:label="us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInManagementFeePayable" xlink:label="us-gaap_IncreaseDecreaseInManagementFeePayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SupplementalCashFlowInformationAbstract" xlink:to="us-gaap_InterestPaidNet" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_ProceedsFromIssuanceOfLongTermDebt" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_ProfitLoss" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SupplementalCashFlowInformationAbstract" xlink:to="us-gaap_IncomeTaxesPaidNet" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_RepaymentsOfLongTermDebt" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInReceivableForInvestmentSold" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SupplementalCashFlowInformationAbstract" xlink:to="ck0001899017_ReinvestmentOfDividends" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_PaymentsOfFinancingCosts" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AmortizationOfDebtDiscountPremium" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_PaymentsOfStockIssuanceCosts" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AmortizationOfFinancingCosts" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_PaymentsForRepurchaseOfCommonStock" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_AmortizationOfDeferredCharges" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_ProceedsFromIssuanceOfCommonStock" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_RealizedInvestmentGainsLosses" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_6" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_PaymentsOfDividends" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_ForeignCurrencyTransactionGainLossRealized" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_SupplementalCashFlowInformationAbstract" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_RestrictedCash" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_ForeignCurrencyTransactionGainLossUnrealizedExcludingInvestmentPriceChangeBeforeTax" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="ck0001899017_CashAndCashEquivalentsHeldInForeignCurrency" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeUnrealizedGainLossOperatingBeforeTax" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfCashFlowsAbstract" xlink:to="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents_11" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInDerivativeAssets" order="13" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" order="14" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInDividendsReceivable" order="15" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInTradingLiabilities" order="16" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInPrepaidInsurance" order="17" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="ck0001899017_IncreaseDecreaseInPrepaidFinancingCosts" order="18" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInOtherReceivables" order="19" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInDueToAffiliates" order="20" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInInterestPayableNet" order="21" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased" order="22" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased" order="23" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities" order="24" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_IncreaseDecreaseInManagementFeePayable" order="25" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AdjustmentsToReconcileNetIncomeLossToCashProvidedByUsedInOperatingActivitiesAbstract" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities" order="26" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestments" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesByIndustryAxis" xlink:label="us-gaap_EquitySecuritiesByIndustryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="us-gaap_EquitySecuritiesIndustryMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AerospaceAndDefenseSectorMember" xlink:label="ck0001899017_AerospaceAndDefenseSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember" xlink:label="ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationExtensibleEnumeration" xlink:label="us-gaap_InvestmentIssuerAffiliationExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:label="us-gaap_InvestmentUnaffiliatedIssuerMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationAxis" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIdentifierAxis" xlink:label="us-gaap_InvestmentIdentifierAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsAbstract" xlink:label="us-gaap_ScheduleOfInvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAxis" xlink:label="us-gaap_CashAndCashEquivalentsAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AutomotiveSectorMember" xlink:label="us-gaap_AutomotiveSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember" xlink:label="ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerNameExtensibleEnumeration" xlink:label="us-gaap_InvestmentIssuerNameExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerControlledMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BankingFinanceInsuranceAndRealEstateMember" xlink:label="ck0001899017_BankingFinanceInsuranceAndRealEstateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeExtensibleEnumeration" xlink:label="us-gaap_InvestmentTypeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BeverageFoodandTobaccoSectorMember" xlink:label="ck0001899017_BeverageFoodandTobaccoSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIndustrySectorExtensibleEnumeration" xlink:label="us-gaap_InvestmentIndustrySectorExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CapitalEquipmentSectorMember" xlink:label="ck0001899017_CapitalEquipmentSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" xlink:label="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentVehiclesMember" xlink:label="ck0001899017_InvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentBasisSpreadVariableRate" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChemicalsPlasticsAndRubberMember" xlink:label="ck0001899017_ChemicalsPlasticsAndRubberMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedDebtBasisSpreadVariableRate" xlink:label="ck0001899017_SubordinatedDebtBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConstructionAndBuildingSectorMember" xlink:label="ck0001899017_ConstructionAndBuildingSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate" xlink:label="ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerGoodsDurableSectorMember" xlink:label="ck0001899017_ConsumerGoodsDurableSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind" xlink:label="ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerGoodsNonDurableSectorMember" xlink:label="ck0001899017_ConsumerGoodsNonDurableSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedDebtSpreadVariableRate" xlink:label="ck0001899017_SubordinatedDebtSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ContainersPackagingAndGlassMember" xlink:label="ck0001899017_ContainersPackagingAndGlassMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRatePaidInKind" xlink:label="us-gaap_InvestmentInterestRatePaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EnvironmentalIndustriesSectorMember" xlink:label="ck0001899017_EnvironmentalIndustriesSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRate" xlink:label="us-gaap_InvestmentInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HealthcareAndPharmaceuticalsMember" xlink:label="ck0001899017_HealthcareAndPharmaceuticalsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate" xlink:label="ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HighTechIndustriesMember" xlink:label="ck0001899017_HighTechIndustriesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreferredEquityInterestRate" xlink:label="ck0001899017_PreferredEquityInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HotelGamingAndLeisureMember" xlink:label="ck0001899017_HotelGamingAndLeisureMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CashEquivalentsInterestRate" xlink:label="ck0001899017_CashEquivalentsInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MediaDiversifiedAndProductionMember" xlink:label="ck0001899017_MediaDiversifiedAndProductionMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentMaturityDate" xlink:label="us-gaap_InvestmentMaturityDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MediaAdvertisingPrintingAndPublishingMember" xlink:label="ck0001899017_MediaAdvertisingPrintingAndPublishingMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MetalsAndMiningMember" xlink:label="ck0001899017_MetalsAndMiningMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalanceShares" xlink:label="us-gaap_InvestmentOwnedBalanceShares"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetailMember" xlink:label="us-gaap_RetailMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesBusinessMember" xlink:label="ck0001899017_ServicesBusinessMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashEquivalentsAtCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesConsumerMember" xlink:label="ck0001899017_ServicesConsumerMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue" xlink:label="ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TelecommunicationsMember" xlink:label="ck0001899017_TelecommunicationsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TransportationCargoMember" xlink:label="ck0001899017_TransportationCargoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CashEquivalentsAtFairValue" xlink:label="ck0001899017_CashEquivalentsAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UtilitiesElectricMember" xlink:label="ck0001899017_UtilitiesElectricMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure" xlink:label="ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UtilitiesWaterMember" xlink:label="ck0001899017_UtilitiesWaterMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:label="us-gaap_InvestmentOwnedPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WholesaleMember" xlink:label="ck0001899017_WholesaleMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CashEquivalentsPercentOfNetAssets" xlink:label="ck0001899017_CashEquivalentsPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireFinanceMember" xlink:label="ck0001899017_FireFinanceMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets" xlink:label="ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireInsuranceMember" xlink:label="ck0001899017_FireInsuranceMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentRestrictionStatus" xlink:label="us-gaap_InvestmentRestrictionStatus"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForestProductsAndPaperSectorMember" xlink:label="ck0001899017_ForestProductsAndPaperSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentSignificantUnobservableInput" xlink:label="us-gaap_InvestmentSignificantUnobservableInput"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashEquivalentsMember" xlink:label="us-gaap_CashEquivalentsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentNonIncomeProducing" xlink:label="us-gaap_InvestmentNonIncomeProducing"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesByIndustryAxis" xlink:to="us-gaap_EquitySecuritiesIndustryMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_AerospaceAndDefenseSectorMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:to="ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentIssuerAffiliationExtensibleEnumeration" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentUnaffiliatedIssuerMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="us-gaap_InvestmentIssuerAffiliationDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentIdentifierAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsAbstract" xlink:to="us-gaap_ScheduleOfInvestmentsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CashAndCashEquivalentsAxis" xlink:to="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_AutomotiveSectorMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:to="ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentIssuerNameExtensibleEnumeration" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerControlledMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_EquitySecuritiesByIndustryAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_BankingFinanceInsuranceAndRealEstateMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentTypeExtensibleEnumeration" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_CashAndCashEquivalentsAxis" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_BeverageFoodandTobaccoSectorMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentIndustrySectorExtensibleEnumeration" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentIssuerAffiliationAxis" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_CapitalEquipmentSectorMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_ScheduleOfInvestmentsLineItems" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_InvestmentVehiclesMember" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentBasisSpreadVariableRate" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ChemicalsPlasticsAndRubberMember" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_SubordinatedDebtBasisSpreadVariableRate" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConstructionAndBuildingSectorMember" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConsumerGoodsDurableSectorMember" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConsumerGoodsNonDurableSectorMember" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_SubordinatedDebtSpreadVariableRate" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ContainersPackagingAndGlassMember" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentInterestRatePaidInKind" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_EnvironmentalIndustriesSectorMember" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentInterestRate" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HealthcareAndPharmaceuticalsMember" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HighTechIndustriesMember" order="13" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_PreferredEquityInterestRate" order="13" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HotelGamingAndLeisureMember" order="14" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_CashEquivalentsInterestRate" order="14" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_MediaDiversifiedAndProductionMember" order="15" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentMaturityDate" order="15" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_MediaAdvertisingPrintingAndPublishingMember" order="16" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedBalancePrincipalAmount" order="16" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_MetalsAndMiningMember" order="17" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedBalanceShares" order="17" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_RetailMember" order="18" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" order="18" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesBusinessMember" order="19" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_CashEquivalentsAtCarryingValue" order="19" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesConsumerMember" order="20" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue" order="20" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_TelecommunicationsMember" order="21" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" order="21" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_TransportationCargoMember" order="22" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_CashEquivalentsAtFairValue" order="22" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_UtilitiesElectricMember" order="23" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure" order="23" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_UtilitiesWaterMember" order="24" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedPercentOfNetAssets" order="24" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_WholesaleMember" order="25" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_CashEquivalentsPercentOfNetAssets" order="25" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_FireFinanceMember" order="26" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets" order="26" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_FireInsuranceMember" order="27" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentRestrictionStatus" order="27" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ForestProductsAndPaperSectorMember" order="28" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentSignificantUnobservableInput" order="28" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_CashEquivalentsMember" order="29" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentNonIncomeProducing" order="29" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsInterestRateSwap" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeVariableInterestRate" xlink:label="us-gaap_DerivativeVariableInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OpenSwapContractIdentifierAxis" xlink:label="us-gaap_OpenSwapContractIdentifierAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsAbstract" xlink:label="us-gaap_ScheduleOfInvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember" xlink:label="us-gaap_InterestRateSwapMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeMaturityDates" xlink:label="us-gaap_DerivativeMaturityDates"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetNotionalAmount" xlink:label="us-gaap_DerivativeAssetNotionalAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeVariableInterestRate" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_OpenSwapContractIdentifierAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsAbstract" xlink:to="us-gaap_ScheduleOfInvestmentsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_InterestRateSwapMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeMaturityDates" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeAssetNotionalAmount" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_ScheduleOfInvestmentsLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsForwardForeignCurrencyExchangeContracts" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityNotionalAmount" xlink:label="us-gaap_DerivativeLiabilityNotionalAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" xlink:label="us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsAbstract" xlink:label="us-gaap_ScheduleOfInvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetNotionalAmount" xlink:label="us-gaap_DerivativeAssetNotionalAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetCounterpartyNameExtensibleList" xlink:label="us-gaap_DerivativeAssetCounterpartyNameExtensibleList"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeMaturityDates" xlink:label="us-gaap_DerivativeMaturityDates"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetFairValueGrossLiability" xlink:label="us-gaap_DerivativeAssetFairValueGrossLiability"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement" xlink:label="us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilities" xlink:label="us-gaap_DerivativeLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssets" xlink:label="us-gaap_DerivativeAssets"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeLiabilityNotionalAmount" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsAbstract" xlink:to="us-gaap_ScheduleOfInvestmentsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeAssetNotionalAmount" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_ScheduleOfInvestmentsLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeAssetCounterpartyNameExtensibleList" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeMaturityDates" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeAssetFairValueGrossLiability" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeLiabilities" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeAssets" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsForwardForeignCurrencyExchangeContractsParenthetical" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNet" xlink:label="us-gaap_AssetsNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AdvancedAircrewMember" xlink:label="ck0001899017_AdvancedAircrewMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationAxis" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsAbstract" xlink:label="us-gaap_ScheduleOfInvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorOneMember" xlink:label="ck0001899017_InterestRateFloorOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NonQualifyingAssetsPercentageOfTotalAsset" xlink:label="ck0001899017_NonQualifyingAssetsPercentageOfTotalAsset"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AGSAmericanServicesInvestmentsLPMember" xlink:label="ck0001899017_AGSAmericanServicesInvestmentsLPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorTwoMember" xlink:label="ck0001899017_InterestRateFloorTwoMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAcquisitionDate" xlink:label="us-gaap_InvestmentAcquisitionDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorThreeMember" xlink:label="ck0001899017_InterestRateFloorThreeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNiRestricted" xlink:label="us-gaap_EquitySecuritiesFvNiRestricted"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BCCCPKInvestments2LPMember" xlink:label="ck0001899017_BCCCPKInvestments2LPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorFourMember" xlink:label="ck0001899017_InterestRateFloorFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedInvestmentsPercentOfNetAssets" xlink:label="us-gaap_RestrictedInvestmentsPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BCCHGSInvestments2LPMember" xlink:label="ck0001899017_BCCHGSInvestments2LPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorFiveMember" xlink:label="ck0001899017_InterestRateFloorFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRateFloor" xlink:label="us-gaap_InvestmentInterestRateFloor"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BCCTrilliumFoodsInvestments2LPMember" xlink:label="ck0001899017_BCCTrilliumFoodsInvestments2LPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorSixMember" xlink:label="ck0001899017_InterestRateFloorSixMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BcpcProjectAberdeenLlcMember" xlink:label="ck0001899017_BcpcProjectAberdeenLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorSevenMember" xlink:label="ck0001899017_InterestRateFloorSevenMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashEquivalents" xlink:label="us-gaap_RestrictedCashEquivalents"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BtxPrecisionMember" xlink:label="ck0001899017_BtxPrecisionMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorEightMember" xlink:label="ck0001899017_InterestRateFloorEightMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChartbeatMember" xlink:label="ck0001899017_ChartbeatMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorNineMember" xlink:label="ck0001899017_InterestRateFloorNineMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentBasisSpreadVariableRate" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CityBbqMember" xlink:label="ck0001899017_CityBbqMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SONIAPlusSixPointFourTwoPercentageMember" xlink:label="ck0001899017_SONIAPlusSixPointFourTwoPercentageMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DtiqMember" xlink:label="ck0001899017_DtiqMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EURIBORPlusSixPointTwoFivePercentageMember" xlink:label="ck0001899017_EURIBORPlusSixPointTwoFivePercentageMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EheHealthMember" xlink:label="ck0001899017_EheHealthMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SONIAPlusSixPointThreeEightPercentageMember" xlink:label="ck0001899017_SONIAPlusSixPointThreeEightPercentageMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ElectronicMerchantSystemsMember" xlink:label="ck0001899017_ElectronicMerchantSystemsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ElevationNewCoIntermediateLLCMember" xlink:label="ck0001899017_ElevationNewCoIntermediateLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EnduranceHoldcoLimitedMember" xlink:label="ck0001899017_EnduranceHoldcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GaleriaMember" xlink:label="ck0001899017_GaleriaMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HGInsightsIncMember" xlink:label="ck0001899017_HGInsightsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HollywoodLPMember" xlink:label="ck0001899017_HollywoodLPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LegacyCorporateLendingHoldcoLlcMember" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LEPCPCo-InvestLPMember" xlink:label="ck0001899017_LEPCPCo-InvestLPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LEPSALCoInvestLPMember" xlink:label="ck0001899017_LEPSALCoInvestLPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OdysseyBehavioralHealthMember" xlink:label="ck0001899017_OdysseyBehavioralHealthMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PayRangeMember" xlink:label="ck0001899017_PayRangeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PPTGroupMember" xlink:label="ck0001899017_PPTGroupMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PureWaferMember" xlink:label="ck0001899017_PureWaferMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RydooMember" xlink:label="ck0001899017_RydooMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SensortowerMember" xlink:label="ck0001899017_SensortowerMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SikichMember" xlink:label="ck0001899017_SikichMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SoftcoMember" xlink:label="ck0001899017_SoftcoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SpindriftMember" xlink:label="ck0001899017_SpindriftMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_AssetsNet" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_AdvancedAircrewMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="us-gaap_InvestmentIssuerAffiliationDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentIssuerAffiliationAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsAbstract" xlink:to="us-gaap_ScheduleOfInvestmentsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorOneMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_NonQualifyingAssetsPercentageOfTotalAsset" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_AGSAmericanServicesInvestmentsLPMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorTwoMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentAcquisitionDate" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_ScheduleOfInvestmentsLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorThreeMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_EquitySecuritiesFvNiRestricted" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_BCCCPKInvestments2LPMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorFourMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_RestrictedInvestmentsPercentOfNetAssets" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_BCCHGSInvestments2LPMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorFiveMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentInterestRateFloor" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_BCCTrilliumFoodsInvestments2LPMember" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorSixMember" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/netLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_BcpcProjectAberdeenLlcMember" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorSevenMember" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_RestrictedCashEquivalents" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_BtxPrecisionMember" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorEightMember" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedBalancePrincipalAmount" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_ChartbeatMember" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorNineMember" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentBasisSpreadVariableRate" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_CityBbqMember" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_SONIAPlusSixPointFourTwoPercentageMember" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_DtiqMember" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_EURIBORPlusSixPointTwoFivePercentageMember" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_EheHealthMember" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_SONIAPlusSixPointThreeEightPercentageMember" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_ElectronicMerchantSystemsMember" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_ElevationNewCoIntermediateLLCMember" order="13" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_EnduranceHoldcoLimitedMember" order="14" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_GaleriaMember" order="15" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_HGInsightsIncMember" order="16" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_HollywoodLPMember" order="17" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_LegacyCorporateLendingHoldcoLlcMember" order="18" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_LEPCPCo-InvestLPMember" order="19" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_LEPSALCoInvestLPMember" order="20" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_OdysseyBehavioralHealthMember" order="21" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_PayRangeMember" order="22" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_PPTGroupMember" order="23" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_PureWaferMember" order="24" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_RydooMember" order="25" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_SensortowerMember" order="26" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_SikichMember" order="27" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_SoftcoMember" order="28" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_SpindriftMember" order="29" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://xbrl.sec.gov/cef/role/N2" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cef/2025/cef-2025.xsd#cef_AllRisksMember" xlink:label="cef_AllRisksMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RisksRelatingToOurBusinessAndStructureMember" xlink:label="ck0001899017_RisksRelatingToOurBusinessAndStructureMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FacilitiesMember" xlink:label="ck0001899017_FacilitiesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RisksRelatingToTheNinteenFourtyActMember" xlink:label="ck0001899017_RisksRelatingToTheNinteenFourtyActMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheAMember" xlink:label="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheAMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RisksRelatingToInvestmentsMember" xlink:label="ck0001899017_RisksRelatingToInvestmentsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheBMember" xlink:label="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheBMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FederalIncomeTaxAndOtherTaxRisksMember" xlink:label="ck0001899017_FederalIncomeTaxAndOtherTaxRisksMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TotalSeniorSecuritiesMember" xlink:label="ck0001899017_TotalSeniorSecuritiesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RisksRelatingToCommonSharesMember" xlink:label="ck0001899017_RisksRelatingToCommonSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GeneralRiskFactorsMember" xlink:label="ck0001899017_GeneralRiskFactorsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RisksRelatingToInfectiousDiseasesAndPandemicsMember" xlink:label="ck0001899017_RisksRelatingToInfectiousDiseasesAndPandemicsMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cef_AllRisksMember" xlink:to="ck0001899017_RisksRelatingToOurBusinessAndStructureMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_FacilitiesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cef_AllRisksMember" xlink:to="ck0001899017_RisksRelatingToTheNinteenFourtyActMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheAMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cef_AllRisksMember" xlink:to="ck0001899017_RisksRelatingToInvestmentsMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheBMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cef_AllRisksMember" xlink:to="ck0001899017_FederalIncomeTaxAndOtherTaxRisksMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TotalSeniorSecuritiesMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cef_AllRisksMember" xlink:to="ck0001899017_RisksRelatingToCommonSharesMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cef_AllRisksMember" xlink:to="ck0001899017_GeneralRiskFactorsMember" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cef_AllRisksMember" xlink:to="ck0001899017_RisksRelatingToInfectiousDiseasesAndPandemicsMember" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCybersecurityRiskManagementStrategyAndGovernance" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementStrategyAndGovernanceTable" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:label="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock" xlink:label="cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:label="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementProcessesIntegratedFlag" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock" xlink:label="cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskRoleOfManagementTextBlock" xlink:label="cyd_CybersecurityRiskRoleOfManagementTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementThirdPartyEngagedFlag" xlink:label="cyd_CybersecurityRiskManagementThirdPartyEngagedFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag" xlink:label="cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock" xlink:label="cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock" xlink:label="cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract" xlink:to="cyd_CybersecurityRiskManagementStrategyAndGovernanceTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems" xlink:to="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:to="cyd_CybersecurityRiskManagementProcessesIntegratedFlag" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract" xlink:to="cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems" xlink:to="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:to="cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskRoleOfManagementTextBlock" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:to="cyd_CybersecurityRiskManagementThirdPartyEngagedFlag" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:to="cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:to="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:to="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureOrganization" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:to="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsDisclosureTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPolicies1" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SignificantAccountingPoliciesTextBlock" xlink:label="us-gaap_SignificantAccountingPoliciesTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_SignificantAccountingPoliciesTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestments" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsAbstract" xlink:label="us-gaap_InvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTextBlock" xlink:label="us-gaap_InvestmentTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentsAbstract" xlink:to="us-gaap_InvestmentTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurements" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="us-gaap_FairValueDisclosuresAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosuresTextBlock" xlink:label="us-gaap_FairValueDisclosuresTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueDisclosuresTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreement" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsDisclosureTextBlock" xlink:label="us-gaap_RelatedPartyTransactionsDisclosureTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_RelatedPartyTransactionsDisclosureTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebt" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtDisclosureTextBlock" xlink:label="us-gaap_DebtDisclosureTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtDisclosureTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivatives" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:to="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssets" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityAbstract" xlink:label="us-gaap_EquityAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityNoteDisclosureTextBlock" xlink:label="us-gaap_StockholdersEquityNoteDisclosureTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_StockholdersEquityNoteDisclosureTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTax" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="us-gaap_IncomeTaxDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxDisclosureTextBlock" xlink:label="us-gaap_IncomeTaxDisclosureTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_IncomeTaxDisclosureTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCommitmentsAndContingencies" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="us-gaap_CommitmentsAndContingenciesDisclosureTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFinancialHighlights" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialHighlightsTextBlock" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_InvestmentCompanyFinancialHighlightsTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnaudited" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:label="us-gaap_QuarterlyFinancialInformationDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_QuarterlyFinancialInformationTextBlock" xlink:label="us-gaap_QuarterlyFinancialInformationTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:to="us-gaap_QuarterlyFinancialInformationTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureWarehousingTransaction" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WarehousingTransactionAbstract" xlink:label="ck0001899017_WarehousingTransactionAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WarehousingTransactionTextBlock" xlink:label="ck0001899017_WarehousingTransactionTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ck0001899017_WarehousingTransactionAbstract" xlink:to="ck0001899017_WarehousingTransactionTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSubsequentEvents" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="us-gaap_SubsequentEventsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventsTextBlock" xlink:label="us-gaap_SubsequentEventsTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventsAbstract" xlink:to="us-gaap_SubsequentEventsTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesPolicies" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BasisOfAccountingPolicyPolicyTextBlock" xlink:label="us-gaap_BasisOfAccountingPolicyPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConsolidationPolicyTextBlock" xlink:label="us-gaap_ConsolidationPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UseOfEstimates" xlink:label="us-gaap_UseOfEstimates"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementPolicyPolicyTextBlock" xlink:label="us-gaap_FairValueMeasurementPolicyPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SecuritiesTransactionsRevenueRecognitionAndExpensesPolicyPolicyTextBlock" xlink:label="ck0001899017_SecuritiesTransactionsRevenueRecognitionAndExpensesPolicyPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenueRecognitionPolicyTextBlock" xlink:label="us-gaap_RevenueRecognitionPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LoansAndLeasesReceivableNonperformingLoanAndLeasePolicy" xlink:label="us-gaap_LoansAndLeasesReceivableNonperformingLoanAndLeasePolicy"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDistributionPolicyTextBlock" xlink:label="us-gaap_InvestmentCompanyDistributionPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DividendReinvestmentPlanPolicyTextBlock" xlink:label="ck0001899017_DividendReinvestmentPlanPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy" xlink:label="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubscriptionsReceivedInAdvancePolicyTextBlock" xlink:label="ck0001899017_SubscriptionsReceivedInAdvancePolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OrganizationExpensesPolicyTextBlock" xlink:label="ck0001899017_OrganizationExpensesPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OfferingCostsPolicyTextBlock" xlink:label="ck0001899017_OfferingCostsPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PrepaidInsurancePolicyTextBlock" xlink:label="ck0001899017_PrepaidInsurancePolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ProfessionalFeesAndOperatingExpensesPolicyTextBlock" xlink:label="ck0001899017_ProfessionalFeesAndOperatingExpensesPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" xlink:label="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativesPolicyTextBlock" xlink:label="us-gaap_DerivativesPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpensePolicyTextBlock" xlink:label="us-gaap_InterestExpensePolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredChargesPolicyTextBlock" xlink:label="us-gaap_DeferredChargesPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ValuationOfOtherFinancialAssetsAndFinancialLiabilitiesPolicyTextBlock" xlink:label="ck0001899017_ValuationOfOtherFinancialAssetsAndFinancialLiabilitiesPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxPolicyTextBlock" xlink:label="us-gaap_IncomeTaxPolicyTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" xlink:label="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_BasisOfAccountingPolicyPolicyTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_ConsolidationPolicyTextBlock" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_UseOfEstimates" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_FairValueMeasurementPolicyPolicyTextBlock" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="ck0001899017_SecuritiesTransactionsRevenueRecognitionAndExpensesPolicyPolicyTextBlock" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_RevenueRecognitionPolicyTextBlock" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_LoansAndLeasesReceivableNonperformingLoanAndLeasePolicy" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_InvestmentCompanyDistributionPolicyTextBlock" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="ck0001899017_DividendReinvestmentPlanPolicyTextBlock" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_CashAndCashEquivalentsRestrictedCashAndCashEquivalentsPolicy" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="ck0001899017_SubscriptionsReceivedInAdvancePolicyTextBlock" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="ck0001899017_OrganizationExpensesPolicyTextBlock" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="ck0001899017_OfferingCostsPolicyTextBlock" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="ck0001899017_PrepaidInsurancePolicyTextBlock" order="13" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="ck0001899017_ProfessionalFeesAndOperatingExpensesPolicyTextBlock" order="14" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_ForeignCurrencyTransactionsAndTranslationsPolicyTextBlock" order="15" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_DerivativesPolicyTextBlock" order="16" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_InterestExpensePolicyTextBlock" order="17" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_DeferredChargesPolicyTextBlock" order="18" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="ck0001899017_ValuationOfOtherFinancialAssetsAndFinancialLiabilitiesPolicyTextBlock" order="19" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_IncomeTaxPolicyTextBlock" order="20" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_NewAccountingPronouncementsPolicyPolicyTextBlock" order="21" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsTables" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTableTextBlock" xlink:label="us-gaap_InvestmentTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsAbstract" xlink:label="us-gaap_InvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfInvestmentByGeographicRegionTableTextBlock" xlink:label="ck0001899017_ScheduleOfInvestmentByGeographicRegionTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfInvestmentByIndustryTableTextBlock" xlink:label="ck0001899017_ScheduleOfInvestmentByIndustryTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock" xlink:label="us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentTableTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentsAbstract" xlink:to="us-gaap_ScheduleOfInvestmentsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="ck0001899017_ScheduleOfInvestmentByGeographicRegionTableTextBlock" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="ck0001899017_ScheduleOfInvestmentByIndustryTableTextBlock" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentHoldingsScheduleOfInvestmentsTableTextBlock" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsTables" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="us-gaap_FairValueDisclosuresAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByBalanceSheetGroupingTextBlock" xlink:label="us-gaap_FairValueByBalanceSheetGroupingTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTableTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTextBlock" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTableTextBlock" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueByBalanceSheetGroupingTextBlock" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementTables" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfShareholderServicingAndOrDistributionFeeTableTextBlock" xlink:label="ck0001899017_ScheduleOfShareholderServicingAndOrDistributionFeeTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SummaryOfAllExpensesSupportedAndRecoupedByTheAdviserTableTextBlock" xlink:label="ck0001899017_SummaryOfAllExpensesSupportedAndRecoupedByTheAdviserTableTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsTableTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="ck0001899017_ScheduleOfShareholderServicingAndOrDistributionFeeTableTextBlock" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="ck0001899017_SummaryOfAllExpensesSupportedAndRecoupedByTheAdviserTableTextBlock" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtTables" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfCarryingValuesOfDebtTableTextBlock" xlink:label="ck0001899017_ScheduleOfCarryingValuesOfDebtTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheAMember" xlink:label="ck0001899017_TrancheAMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" xlink:label="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDebtTableTextBlock" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBMember" xlink:label="ck0001899017_TrancheBMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JpmRevolvingCreditFacilityMember" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock" xlink:label="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:label="us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_Series2025SeniorNotesMember" xlink:label="ck0001899017_Series2025SeniorNotesMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_ScheduleOfCarryingValuesOfDebtTableTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtInstrumentTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheAMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_ScheduleOfDebtTableTextBlock" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheBMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_JpmRevolvingCreditFacilityMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_SmbcRevolvingCreditFacilityMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_Series2025SeniorNotesMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesTables" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems" xlink:label="us-gaap_DerivativeLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable" xlink:label="us-gaap_DerivativeTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember" xlink:label="us-gaap_InterestRateSwapMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:to="us-gaap_DerivativeTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_InterestRateSwapMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_DerivativeLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsTables" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityAbstract" xlink:label="us-gaap_EquityAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyChangesInNetAssetsTableTextBlock" xlink:label="us-gaap_InvestmentCompanyChangesInNetAssetsTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfNetAssetValuePerShareTableTextBlock" xlink:label="ck0001899017_ScheduleOfNetAssetValuePerShareTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsDeclaredTableTextBlock" xlink:label="us-gaap_DividendsDeclaredTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfTreasuryStockByClassTextBlock" xlink:label="us-gaap_ScheduleOfTreasuryStockByClassTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_InvestmentCompanyChangesInNetAssetsTableTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquityAbstract" xlink:to="ck0001899017_ScheduleOfNetAssetValuePerShareTableTextBlock" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_DividendsDeclaredTableTextBlock" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_ScheduleOfTreasuryStockByClassTextBlock" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxTables" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="us-gaap_IncomeTaxDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfTaxableDistributionsTableTextBlock" xlink:label="ck0001899017_ScheduleOfTaxableDistributionsTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfReconciliationOfNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeTableTextBlock" xlink:label="ck0001899017_ScheduleOfReconciliationOfNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfUnrealizedAppreciationAndDepreciationOnInvestmentsForTaxPurposeTableTextBlock" xlink:label="ck0001899017_ScheduleOfUnrealizedAppreciationAndDepreciationOnInvestmentsForTaxPurposeTableTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="ck0001899017_ScheduleOfTaxableDistributionsTableTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="ck0001899017_ScheduleOfReconciliationOfNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeTableTextBlock" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="ck0001899017_ScheduleOfUnrealizedAppreciationAndDepreciationOnInvestmentsForTaxPurposeTableTextBlock" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCommitmentsAndContingenciesTables" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock" xlink:label="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="us-gaap_ScheduleOfFairValueOffBalanceSheetRisksTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFinancialHighlightsTables" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_InvestmentCompanyFinancialHighlightsTableTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnauditedTables" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:label="us-gaap_QuarterlyFinancialInformationDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" xlink:label="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:to="us-gaap_ScheduleOfQuarterlyFinancialInformationTableTextBlock" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureOrganizationDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:label="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassSSharesMember" xlink:label="ck0001899017_ClassSSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" xlink:label="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassDSharesMember" xlink:label="ck0001899017_ClassDSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EarningsBeforeInterestTaxDepreciationAndAmortizationOfMiddleMarketCompanies" xlink:label="ck0001899017_EarningsBeforeInterestTaxDepreciationAndAmortizationOfMiddleMarketCompanies"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="us-gaap_NumberOfOperatingSegments"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfReportableSegments" xlink:label="us-gaap_NumberOfReportableSegments"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration" xlink:label="us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage" xlink:label="ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OrganizationConsolidationAndPresentationOfFinancialStatementsAbstract" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="srt_RangeAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassSSharesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_StatementClassOfStockAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassDSharesMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_EarningsBeforeInterestTaxDepreciationAndAmortizationOfMiddleMarketCompanies" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_NumberOfOperatingSegments" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_NumberOfReportableSegments" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeMember" xlink:to="srt_MinimumMember" order="6.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeMember" xlink:to="srt_MaximumMember" order="7.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSummaryOfSignificantAccountingPoliciesDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountingPoliciesAbstract" xlink:label="us-gaap_AccountingPoliciesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FinancingReceivableNonAccrualNumberOfLoans" xlink:label="ck0001899017_FinancingReceivableNonAccrualNumberOfLoans"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredOfferingCosts" xlink:label="us-gaap_DeferredOfferingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendIncomeOperatingPaidInCash" xlink:label="us-gaap_DividendIncomeOperatingPaidInCash"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDividendIncomeOperatingPaidInKind" xlink:label="us-gaap_InterestAndDividendIncomeOperatingPaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CurrentFederalTaxExpenseBenefit" xlink:label="us-gaap_CurrentFederalTaxExpenseBenefit"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="ck0001899017_FinancingReceivableNonAccrualNumberOfLoans" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_DeferredOfferingCosts" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_DividendIncomeOperatingPaidInCash" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_InterestAndDividendIncomeOperatingPaidInKind" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountingPoliciesAbstract" xlink:to="us-gaap_CurrentFederalTaxExpenseBenefit" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsInvestmentByTypeDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis" xlink:label="us-gaap_InvestmentTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FirstLienSeniorSecuredLoansMember" xlink:label="ck0001899017_FirstLienSeniorSecuredLoansMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsAbstract" xlink:label="us-gaap_InvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentPercentOfPortfolioAmortizedCost" xlink:label="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SecondLienSeniorSecuredLoanMember" xlink:label="ck0001899017_SecondLienSeniorSecuredLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentPercentOfPortfolioFairValue" xlink:label="ck0001899017_InvestmentPercentOfPortfolioFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesMember" xlink:label="us-gaap_EquitySecuritiesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubordinatedDebtMember" xlink:label="us-gaap_SubordinatedDebtMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNotesInInvestmentVehiclesMember" xlink:label="ck0001899017_SubordinatedNotesInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember" xlink:label="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EquityInterestsInInvestmentVehiclesMember" xlink:label="ck0001899017_EquityInterestsInInvestmentVehiclesMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeCategorizationMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_FirstLienSeniorSecuredLoansMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentTypeAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentsAbstract" xlink:to="us-gaap_ScheduleOfInvestmentsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_SecondLienSeniorSecuredLoanMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_ScheduleOfInvestmentsLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_PreferredStockMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentPercentOfPortfolioFairValue" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_EquitySecuritiesMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_SubordinatedDebtMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_WarrantMember" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_SubordinatedNotesInInvestmentVehiclesMember" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_EquityInterestsInInvestmentVehiclesMember" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="srt_EquityMethodInvesteeNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis" xlink:label="us-gaap_InvestmentTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmberstoneCo.Ltd.Member" xlink:label="ck0001899017_AmberstoneCo.Ltd.Member"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain" xlink:label="us-gaap_VariableRateDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MMCLOWH1CreditFacilityMember" xlink:label="ck0001899017_MMCLOWH1CreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract" xlink:label="us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateAxis" xlink:label="us-gaap_VariableRateAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubordinatedDebtMember" xlink:label="us-gaap_SubordinatedDebtMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramLlcMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyCommittedCapital" xlink:label="us-gaap_InvestmentCompanyCommittedCapital"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesMember" xlink:label="us-gaap_EquitySecuritiesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Investments" xlink:label="us-gaap_Investments"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentSoldCarryingAmount" xlink:label="us-gaap_EquityMethodInvestmentSoldCarryingAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityExpirationDate1" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate1"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit" xlink:label="us-gaap_LineOfCredit"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="srt_EquityMethodInvesteeNameDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeCategorizationMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AmberstoneCo.Ltd.Member" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_VariableRateDomain" xlink:to="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:to="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_MMCLOWH1CreditFacilityMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquityMethodInvestmentsAndJointVenturesAbstract" xlink:to="us-gaap_ScheduleOfEquityMethodInvestmentsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_VariableRateAxis" xlink:to="us-gaap_VariableRateDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_SubordinatedDebtMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramLlcMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_EquityMethodInvestmentOwnershipPercentage" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_PreferredStockMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_InvestmentCompanyCommittedCapital" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:to="us-gaap_InvestmentTypeAxis" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_EquitySecuritiesMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_Investments" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:to="us-gaap_CreditFacilityAxis" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_CommonStockMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:to="us-gaap_VariableRateAxis" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_EquityMethodInvestmentSoldCarryingAmount" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:to="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_DebtInstrumentInterestRateEffectivePercentage" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_LineOfCreditFacilityExpirationDate1" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_LineOfCredit" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsInvestmentByGeographicRegionDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US" xlink:label="country_US"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis" xlink:label="srt_StatementGeographicalAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsAbstract" xlink:label="us-gaap_InvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_GB" xlink:label="country_GB"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentPercentOfPortfolioAmortizedCost" xlink:label="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CA" xlink:label="country_CA"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_DE" xlink:label="country_DE"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentPercentOfPortfolioFairValue" xlink:label="ck0001899017_InvestmentPercentOfPortfolioFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_LU" xlink:label="country_LU"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_FR" xlink:label="country_FR"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_IT" xlink:label="country_IT"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_JE" xlink:label="country_JE"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_IE" xlink:label="country_IE"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_AU" xlink:label="country_AU"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_NL" xlink:label="country_NL"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_BE" xlink:label="country_BE"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_GG" xlink:label="country_GG"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_NZ" xlink:label="country_NZ"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_IL" xlink:label="country_IL"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_US" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="srt_StatementGeographicalAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentsAbstract" xlink:to="us-gaap_ScheduleOfInvestmentsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_GB" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_ScheduleOfInvestmentsLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_CA" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_DE" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentPercentOfPortfolioFairValue" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_LU" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_FR" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_IT" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_JE" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_IE" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_AU" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_NL" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_BE" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_GG" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_NZ" order="13" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_IL" order="14" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsInvestmentByIndustryDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesByIndustryAxis" xlink:label="us-gaap_EquitySecuritiesByIndustryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="us-gaap_EquitySecuritiesIndustryMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HealthcareAndPharmaceuticalsMember" xlink:label="ck0001899017_HealthcareAndPharmaceuticalsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsAbstract" xlink:label="us-gaap_InvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesBusinessMember" xlink:label="ck0001899017_ServicesBusinessMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentPercentOfPortfolioAmortizedCost" xlink:label="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HighTechIndustriesMember" xlink:label="ck0001899017_HighTechIndustriesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesConsumerMember" xlink:label="ck0001899017_ServicesConsumerMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentPercentOfPortfolioFairValue" xlink:label="ck0001899017_InvestmentPercentOfPortfolioFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AerospaceSectorMember" xlink:label="us-gaap_AerospaceSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BeverageFoodAndTobaccoMember" xlink:label="ck0001899017_BeverageFoodAndTobaccoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HotelGamingAndLeisureMember" xlink:label="ck0001899017_HotelGamingAndLeisureMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerGoodsNonDurableSectorMember" xlink:label="ck0001899017_ConsumerGoodsNonDurableSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireFinanceSectorMember" xlink:label="ck0001899017_FireFinanceSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionSectorMember" xlink:label="us-gaap_ConstructionSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WholesaleMember" xlink:label="ck0001899017_WholesaleMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChemicalsPlasticsAndRubberMember" xlink:label="ck0001899017_ChemicalsPlasticsAndRubberMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UtilitiesElectricMember" xlink:label="ck0001899017_UtilitiesElectricMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CapitalEquipmentSectorMember" xlink:label="ck0001899017_CapitalEquipmentSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireInsuranceMember" xlink:label="ck0001899017_FireInsuranceMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TransportationCargoSectorMember" xlink:label="ck0001899017_TransportationCargoSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ContainersPackagingAndGlassMember" xlink:label="ck0001899017_ContainersPackagingAndGlassMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AutomotiveSectorMember" xlink:label="us-gaap_AutomotiveSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentOnVehiclesMember" xlink:label="ck0001899017_InvestmentOnVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerSectorDurableMember" xlink:label="ck0001899017_ConsumerSectorDurableMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MediaAdvertisingPrintingAndPublishingMember" xlink:label="ck0001899017_MediaAdvertisingPrintingAndPublishingMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TelecommunicationsMember" xlink:label="ck0001899017_TelecommunicationsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EnvironmentalIndustriesSectorMember" xlink:label="ck0001899017_EnvironmentalIndustriesSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UtilitiesWaterMember" xlink:label="ck0001899017_UtilitiesWaterMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MetalsAndMiningMember" xlink:label="ck0001899017_MetalsAndMiningMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetailSectorMember" xlink:label="us-gaap_RetailSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BankingFinanceInsuranceAndRealEstateMember" xlink:label="ck0001899017_BankingFinanceInsuranceAndRealEstateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MediaDiversifiedAndProductionMember" xlink:label="ck0001899017_MediaDiversifiedAndProductionMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForestProductsAndPaperMember" xlink:label="ck0001899017_ForestProductsAndPaperMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesByIndustryAxis" xlink:to="us-gaap_EquitySecuritiesIndustryMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HealthcareAndPharmaceuticalsMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_EquitySecuritiesByIndustryAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentsAbstract" xlink:to="us-gaap_ScheduleOfInvestmentsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesBusinessMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_ScheduleOfInvestmentsLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HighTechIndustriesMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesConsumerMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentPercentOfPortfolioFairValue" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_AerospaceSectorMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_BeverageFoodAndTobaccoMember" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HotelGamingAndLeisureMember" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConsumerGoodsNonDurableSectorMember" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_FireFinanceSectorMember" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_ConstructionSectorMember" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_WholesaleMember" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ChemicalsPlasticsAndRubberMember" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_UtilitiesElectricMember" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_CapitalEquipmentSectorMember" order="13" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_FireInsuranceMember" order="14" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_TransportationCargoSectorMember" order="15" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ContainersPackagingAndGlassMember" order="16" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_AutomotiveSectorMember" order="17" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_InvestmentOnVehiclesMember" order="18" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConsumerSectorDurableMember" order="19" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_MediaAdvertisingPrintingAndPublishingMember" order="20" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_TelecommunicationsMember" order="21" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_EnvironmentalIndustriesSectorMember" order="22" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_UtilitiesWaterMember" order="23" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_MetalsAndMiningMember" order="24" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_RetailSectorMember" order="25" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_BankingFinanceInsuranceAndRealEstateMember" order="26" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_MediaDiversifiedAndProductionMember" order="27" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ForestProductsAndPaperMember" order="28" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsScheduleOfSlpiisPortfolioAtFairValueDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="us-gaap_ConcentrationRiskByTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="us-gaap_ConcentrationRiskTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskLineItems" xlink:label="us-gaap_ConcentrationRiskLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain" xlink:label="srt_NameOfMajorCustomerDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LargestInvesteeMember" xlink:label="ck0001899017_LargestInvesteeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentConcentrationRiskMember" xlink:label="ck0001899017_InvestmentConcentrationRiskMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentsOperationsMember" xlink:label="ck0001899017_InvestmentsOperationsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis" xlink:label="srt_MajorCustomersAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsAbstract" xlink:label="us-gaap_InvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentSecuritiesWeightedAverageYield" xlink:label="ck0001899017_InvestmentSecuritiesWeightedAverageYield"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FiveLargestInvesteeMember" xlink:label="ck0001899017_FiveLargestInvesteeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NumberOfBorrowers" xlink:label="ck0001899017_NumberOfBorrowers"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentUnfundedCommitments" xlink:label="ck0001899017_InvestmentUnfundedCommitments"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConcentrationRiskByTypeAxis" xlink:to="us-gaap_ConcentrationRiskTypeDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConcentrationRiskLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_NameOfMajorCustomerDomain" xlink:to="ck0001899017_LargestInvesteeMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:to="us-gaap_ConcentrationRiskBenchmarkDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConcentrationRiskTypeDomain" xlink:to="ck0001899017_InvestmentConcentrationRiskMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConcentrationRiskBenchmarkDomain" xlink:to="ck0001899017_InvestmentsOperationsMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_MajorCustomersAxis" xlink:to="srt_NameOfMajorCustomerDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentsAbstract" xlink:to="us-gaap_ScheduleOfInvestmentsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConcentrationRiskLineItems" xlink:to="ck0001899017_InvestmentSecuritiesWeightedAverageYield" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_NameOfMajorCustomerDomain" xlink:to="ck0001899017_FiveLargestInvesteeMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_ConcentrationRiskByBenchmarkAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConcentrationRiskLineItems" xlink:to="ck0001899017_NumberOfBorrowers" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_ConcentrationRiskByTypeAxis" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ConcentrationRiskLineItems" xlink:to="ck0001899017_InvestmentUnfundedCommitments" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="srt_MajorCustomersAxis" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_ConcentrationRiskLineItems" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIisScheduleOfInvestmentsDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesByIndustryAxis" xlink:label="us-gaap_EquitySecuritiesByIndustryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="us-gaap_EquitySecuritiesIndustryMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:label="us-gaap_SummaryOfInvestmentHoldingsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" xlink:label="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AerospaceAndDefenseSectorMember" xlink:label="ck0001899017_AerospaceAndDefenseSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsAbstract" xlink:label="us-gaap_InvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentBasisSpreadVariableRate" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AutomotiveSectorMember" xlink:label="us-gaap_AutomotiveSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRatePaidInKind" xlink:label="us-gaap_InvestmentInterestRatePaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CapitalEquipmentSectorMember" xlink:label="ck0001899017_CapitalEquipmentSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIdentifierAxis" xlink:label="us-gaap_InvestmentIdentifierAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRate" xlink:label="us-gaap_InvestmentInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConstructionBuildingMember" xlink:label="ck0001899017_ConstructionBuildingMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentMaturityDate" xlink:label="us-gaap_InvestmentMaturityDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerGoodsNonDurableSectorMember" xlink:label="ck0001899017_ConsumerGoodsNonDurableSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireFinanceMember" xlink:label="ck0001899017_FireFinanceMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalanceShares" xlink:label="us-gaap_InvestmentOwnedBalanceShares"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HealthcareAndPharmaceuticalsMember" xlink:label="ck0001899017_HealthcareAndPharmaceuticalsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HighTechIndustriesMember" xlink:label="ck0001899017_HighTechIndustriesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HotelGamingAndLeisureMember" xlink:label="ck0001899017_HotelGamingAndLeisureMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:label="us-gaap_InvestmentOwnedPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesBusinessMember" xlink:label="ck0001899017_ServicesBusinessMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesConsumerMember" xlink:label="ck0001899017_ServicesConsumerMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UtilitiesElectricMember" xlink:label="ck0001899017_UtilitiesElectricMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WholesaleMember" xlink:label="ck0001899017_WholesaleMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesByIndustryAxis" xlink:to="us-gaap_EquitySecuritiesIndustryMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_AerospaceAndDefenseSectorMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentsAbstract" xlink:to="us-gaap_ScheduleOfInvestmentsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentBasisSpreadVariableRate" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_AutomotiveSectorMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_EquitySecuritiesByIndustryAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentInterestRatePaidInKind" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_CapitalEquipmentSectorMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentIdentifierAxis" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentInterestRate" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConstructionBuildingMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_SummaryOfInvestmentHoldingsLineItems" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentMaturityDate" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConsumerGoodsNonDurableSectorMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedBalancePrincipalAmount" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_FireFinanceMember" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedBalanceShares" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HealthcareAndPharmaceuticalsMember" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HighTechIndustriesMember" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HotelGamingAndLeisureMember" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedPercentOfNetAssets" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesBusinessMember" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesConsumerMember" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_UtilitiesElectricMember" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_WholesaleMember" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIisScheduleOfInvestmentsParentheticalDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:label="us-gaap_SummaryOfInvestmentHoldingsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNet" xlink:label="us-gaap_AssetsNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorOneMember" xlink:label="ck0001899017_InterestRateFloorOneMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsAbstract" xlink:label="us-gaap_InvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorTwoMember" xlink:label="ck0001899017_InterestRateFloorTwoMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIdentifierAxis" xlink:label="us-gaap_InvestmentIdentifierAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorThreeMember" xlink:label="ck0001899017_InterestRateFloorThreeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorFourMember" xlink:label="ck0001899017_InterestRateFloorFourMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_AssetsNet" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_InterestRateFloorOneMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentsAbstract" xlink:to="us-gaap_ScheduleOfInvestmentsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/netLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_InterestRateFloorTwoMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentIdentifierAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_InterestRateFloorThreeMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_DebtInstrumentAxis" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_InterestRateFloorFourMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_SummaryOfInvestmentHoldingsLineItems" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIiBalanceSheetDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsAbstract" xlink:label="us-gaap_InvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseCurrent" xlink:label="us-gaap_PrepaidExpenseCurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredOfferingCosts" xlink:label="us-gaap_DeferredOfferingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestReceivable" xlink:label="us-gaap_InterestReceivable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesPayable" xlink:label="us-gaap_NotesPayable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers" xlink:label="ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit" xlink:label="us-gaap_LineOfCredit"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:label="us-gaap_DividendsPayableCurrentAndNoncurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedAmortizationDeferredFinanceCosts" xlink:label="us-gaap_AccumulatedAmortizationDeferredFinanceCosts"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentsAbstract" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_PrepaidExpenseCurrent" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_DeferredOfferingCosts" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_InterestReceivable" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_Assets" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_NotesPayable" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_InterestPayableCurrentAndNoncurrent" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_LineOfCredit" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_DividendsPayableCurrentAndNoncurrent" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_Liabilities" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_StockholdersEquity" order="13" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" order="14" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity" order="15" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" order="16" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_AccumulatedAmortizationDeferredFinanceCosts" order="17" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIiStatementOfOperationsDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:label="us-gaap_RealizedInvestmentGainsLossesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeRealizedGainLossOperatingBeforeTax" xlink:label="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeRealizedGainLossOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetInvestmentIncomeAbstract" xlink:label="us-gaap_NetInvestmentIncomeAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="us-gaap_InvestmentIncomeInterest"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="us-gaap_CostsAndExpensesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsAbstract" xlink:label="us-gaap_InvestmentsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="us-gaap_UnrealizedGainLossOnInvestments"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossInvestmentIncomeOperating" xlink:label="us-gaap_GrossInvestmentIncomeOperating"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ProfessionalFeesAndOtherExpenses" xlink:label="ck0001899017_ProfessionalFeesAndOtherExpenses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:label="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInvestmentExpense" xlink:label="us-gaap_InvestmentIncomeInvestmentExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeRealizedGainLossOperatingBeforeTax" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetInvestmentIncomeAbstract" xlink:to="us-gaap_InvestmentIncomeInterest" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CostsAndExpensesAbstract" xlink:to="us-gaap_InterestExpense" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentsAbstract" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_NetInvestmentIncomeAbstract" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_UnrealizedGainLossOnInvestments" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_NetInvestmentIncomeAbstract" xlink:to="us-gaap_GrossInvestmentIncomeOperating" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CostsAndExpensesAbstract" xlink:to="ck0001899017_ProfessionalFeesAndOtherExpenses" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_CostsAndExpensesAbstract" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CostsAndExpensesAbstract" xlink:to="us-gaap_InvestmentIncomeInvestmentExpense" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_RealizedInvestmentGainsLossesAbstract" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_NetIncomeLoss" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfInvestmentsByFairValueHierarchyDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis" xlink:label="us-gaap_InvestmentTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="us-gaap_FairValueInputsLevel1Member"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember" xlink:label="us-gaap_InterestRateSwapMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FirstLienSeniorSecuredLoansMember" xlink:label="ck0001899017_FirstLienSeniorSecuredLoansMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="us-gaap_FairValueDisclosuresAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="us-gaap_ForeignExchangeForwardMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="us-gaap_FairValueInputsLevel2Member"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SecondLienSeniorSecuredLoanMember" xlink:label="ck0001899017_SecondLienSeniorSecuredLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilities" xlink:label="us-gaap_DerivativeLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubordinatedDebtMember" xlink:label="us-gaap_SubordinatedDebtMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" xlink:label="us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesMember" xlink:label="us-gaap_EquitySecuritiesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNoteInInvestmentVehiclesMember" xlink:label="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember" xlink:label="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EquityInterestInInvestmentVehiclesMember" xlink:label="ck0001899017_EquityInterestInInvestmentVehiclesMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeCategorizationMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel1Member" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="us-gaap_InterestRateSwapMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_FirstLienSeniorSecuredLoansMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_ForeignExchangeForwardMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="us-gaap_CashAndCashEquivalentsFairValueDisclosure" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel2Member" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_SecondLienSeniorSecuredLoanMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_InvestmentTypeAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="us-gaap_DerivativeLiabilities" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel3Member" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_SubordinatedDebtMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_PreferredStockMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_FinancialInstrumentAxis" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_EquitySecuritiesMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_WarrantMember" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_EquityInterestInInvestmentVehiclesMember" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="us-gaap_FairValueDisclosuresAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsReconciliationOfInvestmentDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis" xlink:label="us-gaap_InvestmentTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FirstLienSeniorSecuredLoansMember" xlink:label="ck0001899017_FirstLienSeniorSecuredLoansMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="us-gaap_FairValueDisclosuresAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SecondLienSeniorSecuredLoansMember" xlink:label="ck0001899017_SecondLienSeniorSecuredLoansMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesMember" xlink:label="us-gaap_EquitySecuritiesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPaidInKindInterest" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPaidInKindInterest"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAccretionAmortizationOfDiscountPremium" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAccretionAmortizationOfDiscountPremium"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubordinatedDebtMember" xlink:label="us-gaap_SubordinatedDebtMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLossSubsidiary" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLossSubsidiary"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNoteInInvestmentVehiclesMember" xlink:label="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsSubsidiary" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsSubsidiary"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_8"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossSubsidiary" xlink:label="ck0001899017_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossSubsidiary"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeCategorizationMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel3Member" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_FirstLienSeniorSecuredLoansMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="us-gaap_InvestmentTypeAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_SecondLienSeniorSecuredLoansMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_EquitySecuritiesMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPaidInKindInterest" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_PreferredStockMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAccretionAmortizationOfDiscountPremium" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_SubordinatedDebtMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_WarrantMember" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLossSubsidiary" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsSubsidiary" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue_8" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="ck0001899017_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossSubsidiary" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfSignificantUnobservableInputsUsedToValueLevel3AssetsDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedMember" xlink:label="ck0001899017_SubordinatedMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueAxis" xlink:label="us-gaap_ValuationTechniqueAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="us-gaap_ValuationTechniqueDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember" xlink:label="us-gaap_ValuationTechniqueDiscountedCashFlowMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="us-gaap_MeasurementInputTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputComparabilityAdjustmentMember" xlink:label="us-gaap_MeasurementInputComparabilityAdjustmentMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FirstLienSeniorSecuredLoansMember" xlink:label="ck0001899017_FirstLienSeniorSecuredLoansMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeAxis" xlink:label="us-gaap_MeasurementInputTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="us-gaap_FairValueDisclosuresAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentsOwnedExcludingInvestmentsUnobservableInputsNotDeveloped" xlink:label="ck0001899017_InvestmentsOwnedExcludingInvestmentsUnobservableInputsNotDeveloped"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="us-gaap_FairValueByAssetClassAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesMember" xlink:label="us-gaap_EquitySecuritiesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ValuationTechniqueComparableCompanyMultipleMember" xlink:label="ck0001899017_ValuationTechniqueComparableCompanyMultipleMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputEbitdaMultipleMember" xlink:label="us-gaap_MeasurementInputEbitdaMultipleMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SecondLienSeniorSecuredLoansMember" xlink:label="ck0001899017_SecondLienSeniorSecuredLoansMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AlternativeInvestmentMeasurementInput" xlink:label="us-gaap_AlternativeInvestmentMeasurementInput"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ValuationTechniqueCollateralCoverageMember" xlink:label="ck0001899017_ValuationTechniqueCollateralCoverageMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MeasurementInputRecoveryRateMember" xlink:label="ck0001899017_MeasurementInputRecoveryRateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNoteInInvestmentVehiclesMember" xlink:label="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeExtensibleEnumeration" xlink:label="us-gaap_InvestmentTypeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputDiscountRateMember" xlink:label="us-gaap_MeasurementInputDiscountRateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MeasurementInputBookValueMultipleMember" xlink:label="ck0001899017_MeasurementInputBookValueMultipleMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputRevenueMultipleMember" xlink:label="us-gaap_MeasurementInputRevenueMultipleMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_WeightedAverageMember" xlink:label="srt_WeightedAverageMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:to="ck0001899017_SubordinatedMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ValuationTechniqueAxis" xlink:to="us-gaap_ValuationTechniqueDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_FinancialInstrumentAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ValuationTechniqueDomain" xlink:to="us-gaap_ValuationTechniqueDiscountedCashFlowMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputComparabilityAdjustmentMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel3Member" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_FirstLienSeniorSecuredLoansMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MeasurementInputTypeAxis" xlink:to="us-gaap_MeasurementInputTypeDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="ck0001899017_InvestmentsOwnedExcludingInvestmentsUnobservableInputsNotDeveloped" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueByAssetClassAxis" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:to="us-gaap_EquitySecuritiesMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_ValuationTechniqueAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ValuationTechniqueDomain" xlink:to="ck0001899017_ValuationTechniqueComparableCompanyMultipleMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputEbitdaMultipleMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_SecondLienSeniorSecuredLoansMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_AlternativeInvestmentMeasurementInput" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:to="us-gaap_PreferredStockMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_MeasurementInputTypeAxis" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ValuationTechniqueDomain" xlink:to="ck0001899017_ValuationTechniqueCollateralCoverageMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="ck0001899017_MeasurementInputRecoveryRateMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_InvestmentTypeExtensibleEnumeration" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:to="us-gaap_WarrantMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="srt_RangeAxis" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputDiscountRateMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="ck0001899017_MeasurementInputBookValueMultipleMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_FairValueByAssetClassAxis" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputRevenueMultipleMember" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeMember" xlink:to="srt_MinimumMember" order="6.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeMember" xlink:to="srt_MaximumMember" order="7.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeMember" xlink:to="srt_WeightedAverageMember" order="8.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfSignificantUnobservableInputsUsedToValueLevel3AssetsParentheticalDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="us-gaap_FairValueDisclosuresAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="us-gaap_AssetsFairValueDisclosure"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel3Member" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_AssetsFairValueDisclosure" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfDebtObligationsCarriedAtFairValueDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GsRevolvingCreditFacilityMember" xlink:label="ck0001899017_GsRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="us-gaap_DebtInstrumentFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_Series2025SeniorNotesMember" xlink:label="ck0001899017_Series2025SeniorNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueDisclosuresAbstract" xlink:label="us-gaap_FairValueDisclosuresAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JpmRevolvingCreditFacilityMember" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="us-gaap_FairValueInputsLevel2Member"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheAMember" xlink:label="ck0001899017_TrancheAMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBMember" xlink:label="ck0001899017_TrancheBMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_GsRevolvingCreditFacilityMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="us-gaap_DebtInstrumentFairValue" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_Series2025SeniorNotesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel3Member" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueDisclosuresAbstract" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_JpmRevolvingCreditFacilityMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel2Member" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_DebtInstrumentAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_SmbcRevolvingCreditFacilityMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_CreditFacilityAxis" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheAMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheBMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementBaseManagementFeeDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BcsfAdvisorsLpMember" xlink:label="ck0001899017_BcsfAdvisorsLpMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementAndServiceFeesBaseRate" xlink:label="us-gaap_ManagementAndServiceFeesBaseRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementFeeExpense" xlink:label="us-gaap_ManagementFeeExpense"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ManagementFeeExpenseContractuallyWaived" xlink:label="ck0001899017_ManagementFeeExpenseContractuallyWaived"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ManagementFeeExpenseVoluntarilyWaived" xlink:label="ck0001899017_ManagementFeeExpenseVoluntarilyWaived"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementFeePayable" xlink:label="us-gaap_ManagementFeePayable"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="ck0001899017_BcsfAdvisorsLpMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ManagementAndServiceFeesBaseRate" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ManagementFeeExpense" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_ManagementFeeExpenseContractuallyWaived" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_ManagementFeeExpenseVoluntarilyWaived" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ManagementFeePayable" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementIncentiveFeeDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="us-gaap_RelatedPartyTransactionAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="us-gaap_RelatedPartyTransactionDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BcsfAdvisorsLpMember" xlink:label="ck0001899017_BcsfAdvisorsLpMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfPrecedingCalendarQuarters" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfPrecedingCalendarQuarters"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_IncentiveFeeBasedOnIncomeMember" xlink:label="ck0001899017_IncentiveFeeBasedOnIncomeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfTrailingQuarters" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfTrailingQuarters"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreIncentiveFeeNetInvestmentIncomeEqualToLessThanCatchUpAmountMember" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeEqualToLessThanCatchUpAmountMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeeExpense" xlink:label="us-gaap_IncentiveFeeExpense"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreIncentiveFeeNetInvestmentIncomeLessThanOrEqualToCatchUpAmountMember" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeLessThanOrEqualToCatchUpAmountMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyTotalReturnBeforeIncentiveFees" xlink:label="us-gaap_InvestmentCompanyTotalReturnBeforeIncentiveFees"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayable" xlink:label="us-gaap_IncentiveFeePayable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_IncentiveFeeCapMember" xlink:label="ck0001899017_IncentiveFeeCapMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_IncentiveFeesVoluntarilyWaived" xlink:label="ck0001899017_IncentiveFeesVoluntarilyWaived"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GaapIncentiveFeeMember" xlink:label="ck0001899017_GaapIncentiveFeeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis" xlink:label="ck0001899017_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CatchUpAmountPercentMultipliedToNav" xlink:label="ck0001899017_CatchUpAmountPercentMultipliedToNav"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyIncentiveFeeToAverageNetAssets" xlink:label="us-gaap_InvestmentCompanyIncentiveFeeToAverageNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayableCapitalGainBased" xlink:label="us-gaap_IncentiveFeePayableCapitalGainBased"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="ck0001899017_BcsfAdvisorsLpMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfPrecedingCalendarQuarters" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_IncentiveFeeBasedOnIncomeMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfTrailingQuarters" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_PreIncentiveFeeNetInvestmentIncomeEqualToLessThanCatchUpAmountMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_IncentiveFeeExpense" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_PreIncentiveFeeNetInvestmentIncomeLessThanOrEqualToCatchUpAmountMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_InvestmentCompanyTotalReturnBeforeIncentiveFees" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_IncentiveFeePayable" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_IncentiveFeeCapMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_IncentiveFeesVoluntarilyWaived" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_GaapIncentiveFeeMember" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_CatchUpAmountPercentMultipliedToNav" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_InvestmentCompanyIncentiveFeeToAverageNetAssets" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_IncentiveFeePayableCapitalGainBased" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementAdministrationAgreementDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="us-gaap_BalanceSheetLocationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesMember" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="us-gaap_BalanceSheetLocationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdministrativeServiceMember" xlink:label="us-gaap_AdministrativeServiceMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdministrativeFeesExpense" xlink:label="us-gaap_AdministrativeFeesExpense"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubAdministratorMember" xlink:label="ck0001899017_SubAdministratorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdministrativeFeePayable" xlink:label="us-gaap_AdministrativeFeePayable"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_BalanceSheetLocationDomain" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_BalanceSheetLocationAxis" xlink:to="us-gaap_BalanceSheetLocationDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_AdministrativeServiceMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_AdministrativeFeesExpense" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="ck0001899017_SubAdministratorMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_BalanceSheetLocationAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_AdministrativeFeePayable" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_IncomeStatementLocationAxis" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionLineItems" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementResourceSharingAgreementDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BcsfAdvisorsLpMember" xlink:label="ck0001899017_BcsfAdvisorsLpMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PeriodOfTerminationByNotice" xlink:label="ck0001899017_PeriodOfTerminationByNotice"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="ck0001899017_BcsfAdvisorsLpMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PeriodOfTerminationByNotice" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementRelatedPartyCommitmentsDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAdviceMember" xlink:label="us-gaap_InvestmentAdviceMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassISharesMember" xlink:label="ck0001899017_ClassISharesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_InvestmentAdviceMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_CommonStockSharesOutstanding" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassISharesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_StatementClassOfStockAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementScheduleOfNoncontrolledaffiliateAndControlledAffiliateInvestmentsDet" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="srt_EquityMethodInvesteeNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis" xlink:label="us-gaap_InvestmentTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BCCCPKInvestments2LPEquityInterestMember" xlink:label="ck0001899017_BCCCPKInvestments2LPEquityInterestMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationAxis" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember" xlink:label="us-gaap_CommonClassAMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CPKIPCOBuyerLLCSubordinatedDebtMember" xlink:label="ck0001899017_CPKIPCOBuyerLLCSubordinatedDebtMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerControlledMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EquityInterestMember" xlink:label="ck0001899017_EquityInterestMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LegacyCorporateLendingHoldcoLlcClassACommonEquityMember" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcClassACommonEquityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NonControlledAffiliateAndControlledAffiliateInvestmentsMember" xlink:label="ck0001899017_NonControlledAffiliateAndControlledAffiliateInvestmentsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductions" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductions"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LegacyCorporateLendingHoldcoLlcPreferredEquityMember" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcPreferredEquityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedMember" xlink:label="ck0001899017_SubordinatedMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="us-gaap_UnrealizedGainLossOnInvestments"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCSubordinatedNoteInvestmentVehiclesMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCSubordinatedNoteInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="us-gaap_RealizedInvestmentGainsLosses"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCEquityInterestInvestmentVehiclesMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCEquityInterestInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue_5"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCPreferredEquityInterestInvestmentVehiclesMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCPreferredEquityInterestInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInterestAndDividend" xlink:label="us-gaap_InvestmentIncomeInterestAndDividend"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="us-gaap_OtherNonoperatingIncomeExpense"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="srt_EquityMethodInvesteeNameDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeCategorizationMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BCCCPKInvestments2LPEquityInterestMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="us-gaap_InvestmentIssuerAffiliationDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_CommonClassAMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_InvestmentTypeAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_CPKIPCOBuyerLLCSubordinatedDebtMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerControlledMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_EquityInterestMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_LegacyCorporateLendingHoldcoLlcClassACommonEquityMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_NonControlledAffiliateAndControlledAffiliateInvestmentsMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_PreferredStockMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_InvestmentIssuerAffiliationAxis" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductions" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_LegacyCorporateLendingHoldcoLlcPreferredEquityMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_SubordinatedMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionLineItems" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_UnrealizedGainLossOnInvestments" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCSubordinatedNoteInvestmentVehiclesMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RealizedInvestmentGainsLosses" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCEquityInterestInvestmentVehiclesMember" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue_5" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCPreferredEquityInterestInvestmentVehiclesMember" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_InvestmentIncomeInterestAndDividend" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_OtherNonoperatingIncomeExpense" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementManagingDealerAgreementDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassSSharesMember" xlink:label="ck0001899017_ClassSSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfManagingDealerReceiveAFeeOfOfferingProceeds" xlink:label="ck0001899017_PercentageOfManagingDealerReceiveAFeeOfOfferingProceeds"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassDSharesMember" xlink:label="ck0001899017_ClassDSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReceivedPurchaseOrders" xlink:label="ck0001899017_ReceivedPurchaseOrders"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOrSaleOfEquity" xlink:label="us-gaap_ProceedsFromIssuanceOrSaleOfEquity"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MaximumEstimatedManagingDealerFee" xlink:label="ck0001899017_MaximumEstimatedManagingDealerFee"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage" xlink:label="ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" xlink:label="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfUnderwiringCompensationOnGrossProceedsOfPrimaryOffering" xlink:label="ck0001899017_PercentageOfUnderwiringCompensationOnGrossProceedsOfPrimaryOffering"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DistributionAndShareholderServicingFees" xlink:label="ck0001899017_DistributionAndShareholderServicingFees"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_StatementClassOfStockAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RelatedPartyTransactionAmountsOfTransaction" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassSSharesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PercentageOfManagingDealerReceiveAFeeOfOfferingProceeds" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassDSharesMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_ReceivedPurchaseOrders" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ProceedsFromIssuanceOrSaleOfEquity" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_MaximumEstimatedManagingDealerFee" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PercentageOfUnderwiringCompensationOnGrossProceedsOfPrimaryOffering" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_DistributionAndShareholderServicingFees" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementScheduleOfShareholderServicingAndorDistributionFeesDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RelatedPartyTransactionShareholderServicingAndDistributionFeesPercentage" xlink:label="ck0001899017_RelatedPartyTransactionShareholderServicingAndDistributionFeesPercentage"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassSSharesMember" xlink:label="ck0001899017_ClassSSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassDSharesMember" xlink:label="ck0001899017_ClassDSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassISharesMember" xlink:label="ck0001899017_ClassISharesMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_StatementClassOfStockAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_RelatedPartyTransactionShareholderServicingAndDistributionFeesPercentage" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassSSharesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassDSharesMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassISharesMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementDistributionAndServicingPlanDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" xlink:label="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassSSharesMember" xlink:label="ck0001899017_ClassSSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassDSharesMember" xlink:label="ck0001899017_ClassDSharesMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_StatementClassOfStockAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassSSharesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassDSharesMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementExpenseSupportAndConditionalReimbursementAgreementDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReimbursementPercentageOfOtherOperatingExpenses" xlink:label="ck0001899017_ReimbursementPercentageOfOtherOperatingExpenses"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_ReimbursementPercentageOfOtherOperatingExpenses" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementSummaryOfAllExpensesSupportedAndRecoupedByTheAdviserDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="us-gaap_RelatedPartyTransactionAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="us-gaap_RelatedPartyTransactionDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsAbstract" xlink:label="us-gaap_RelatedPartyTransactionsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReimbursementEligibilityExpirationDateNovemberThirtyTwoThousandTwentySixMember" xlink:label="ck0001899017_ReimbursementEligibilityExpirationDateNovemberThirtyTwoThousandTwentySixMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmountOfExpenseSupportMember" xlink:label="ck0001899017_AmountOfExpenseSupportMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReimbursementEligibilityExpirationDateJanuaryThirtyOneThousandTwentySevenMember" xlink:label="ck0001899017_ReimbursementEligibilityExpirationDateJanuaryThirtyOneThousandTwentySevenMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionRate" xlink:label="us-gaap_RelatedPartyTransactionRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RecoupmentOfExpenseSupportMember" xlink:label="ck0001899017_RecoupmentOfExpenseSupportMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RelatedPartyTransactionOperatingExpenseRatio" xlink:label="ck0001899017_RelatedPartyTransactionOperatingExpenseRatio"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UnreimbursedExpenseSupportMember" xlink:label="ck0001899017_UnreimbursedExpenseSupportMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsAbstract" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="ck0001899017_ReimbursementEligibilityExpirationDateNovemberThirtyTwoThousandTwentySixMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RelatedPartyTransactionAmountsOfTransaction" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_AmountOfExpenseSupportMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="ck0001899017_ReimbursementEligibilityExpirationDateJanuaryThirtyOneThousandTwentySevenMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RelatedPartyTransactionRate" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_RecoupmentOfExpenseSupportMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_RelatedPartyTransactionOperatingExpenseRatio" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_UnreimbursedExpenseSupportMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" xlink:label="us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="us-gaap_SubsequentEventTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember" xlink:label="us-gaap_SubsequentEventMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain" xlink:label="us-gaap_VariableRateDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AbrLoanMember" xlink:label="ck0001899017_AbrLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" xlink:label="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateAxis" xlink:label="us-gaap_VariableRateAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioForecastMember" xlink:label="srt_ScenarioForecastMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="us-gaap_SubsequentEventTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentOfAssetCoverage" xlink:label="ck0001899017_PercentOfAssetCoverage"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CreditAdjustmentSpreadMember" xlink:label="ck0001899017_CreditAdjustmentSpreadMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RfrLoanMember" xlink:label="ck0001899017_RfrLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JpmRevolvingCreditFacilityMember" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtWeightedAverageInterestRate" xlink:label="us-gaap_DebtWeightedAverageInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TermBenchmarkLoanMember" xlink:label="ck0001899017_TermBenchmarkLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:label="us-gaap_LineOfCreditFacilityAverageOutstandingAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheANotesMember" xlink:label="ck0001899017_TrancheANotesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_Series2025SeniorNotesMember" xlink:label="ck0001899017_Series2025SeniorNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBNotesMember" xlink:label="ck0001899017_TrancheBNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LineOfCreditFacilityCurrentBorrowingCapacityRegardingProvisionToPermitIncreasesOfTermAndRevolvingCommitments" xlink:label="ck0001899017_LineOfCreditFacilityCurrentBorrowingCapacityRegardingProvisionToPermitIncreasesOfTermAndRevolvingCommitments"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtInstrumentTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_VariableRateDomain" xlink:to="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_AbrLoanMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_VariableRateAxis" xlink:to="us-gaap_VariableRateDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="srt_ScenarioForecastMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_PercentOfAssetCoverage" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_VariableRateDomain" xlink:to="ck0001899017_CreditAdjustmentSpreadMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_RfrLoanMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_JpmRevolvingCreditFacilityMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtWeightedAverageInterestRate" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="srt_StatementScenarioAxis" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TermBenchmarkLoanMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_SmbcRevolvingCreditFacilityMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityAverageOutstandingAmount" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_SubsequentEventTypeAxis" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheANotesMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_Series2025SeniorNotesMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_VariableRateAxis" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheBNotesMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="srt_RangeAxis" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentLineItems" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeMember" xlink:to="srt_MaximumMember" order="6.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_LineOfCreditFacilityCurrentBorrowingCapacityRegardingProvisionToPermitIncreasesOfTermAndRevolvingCommitments" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RangeMember" xlink:to="srt_MinimumMember" order="7.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentFaceAmount" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtOutstandingBorrowingsDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheAMember" xlink:label="ck0001899017_TrancheAMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" xlink:label="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="us-gaap_DebtInstrumentCarryingAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBMember" xlink:label="ck0001899017_TrancheBMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JpmRevolvingCreditFacilityMember" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_Series2025SeniorNotesMember" xlink:label="ck0001899017_Series2025SeniorNotesMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentFaceAmount" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtInstrumentTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheAMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentCarryingAmount" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheBMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_JpmRevolvingCreditFacilityMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LongTermDebt" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_SmbcRevolvingCreditFacilityMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_Series2025SeniorNotesMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtMaturitiesOfDebtObligationsDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="us-gaap_DebtInstrumentCarryingAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheAMember" xlink:label="ck0001899017_TrancheAMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" xlink:label="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtMaturingInYearsTwoAndThree" xlink:label="us-gaap_LongTermDebtMaturingInYearsTwoAndThree"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBMember" xlink:label="ck0001899017_TrancheBMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JpmRevolvingCreditFacilityMember" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtMaturingInYearsFourAndFive" xlink:label="us-gaap_LongTermDebtMaturingInYearsFourAndFive"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_Series2025SeniorNotesMember" xlink:label="ck0001899017_Series2025SeniorNotesMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentCarryingAmount" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtInstrumentTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheAMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LongTermDebtMaturingInYearsTwoAndThree" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheBMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_JpmRevolvingCreditFacilityMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LongTermDebtMaturingInYearsFourAndFive" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_SmbcRevolvingCreditFacilityMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_Series2025SeniorNotesMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnGoldmanSachsRevolvingCreditFacilityDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt" xlink:label="us-gaap_InterestExpenseDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" xlink:label="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeeAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDebtExpense" xlink:label="us-gaap_InterestAndDebtExpense"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestExpenseDebt" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtInstrumentTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityCommitmentFeeAmount" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestAndDebtExpense" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnJpmRevolvingCreditFacilityDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt" xlink:label="us-gaap_InterestExpenseDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JpmRevolvingCreditFacilityMember" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeeAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDebtExpense" xlink:label="us-gaap_InterestAndDebtExpense"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestExpenseDebt" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtInstrumentTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_JpmRevolvingCreditFacilityMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityCommitmentFeeAmount" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestAndDebtExpense" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnSmbcRevolvingCreditFacilityDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt" xlink:label="us-gaap_InterestExpenseDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeeAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDebtExpense" xlink:label="us-gaap_InterestAndDebtExpense"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestExpenseDebt" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtInstrumentTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_SmbcRevolvingCreditFacilityMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityCommitmentFeeAmount" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestAndDebtExpense" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtScheduleOfComponentsOfCarryingValueDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="us-gaap_LineOfCreditFacilityTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheANotesMember" xlink:label="ck0001899017_TrancheANotesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_Series2025SeniorNotesMember" xlink:label="ck0001899017_Series2025SeniorNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="us-gaap_ShortTermDebtLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBNotesMember" xlink:label="ck0001899017_TrancheBNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DebtInstrumentEffectiveInterestRateSwapHedge" xlink:label="ck0001899017_DebtInstrumentEffectiveInterestRateSwapHedge"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LineOfCreditFacilityTable" xlink:to="us-gaap_CreditFacilityAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_LineOfCreditFacilityTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheANotesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_Series2025SeniorNotesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShortTermDebtLineItems" xlink:to="us-gaap_DebtInstrumentFaceAmount" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/netLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LineOfCreditFacilityTable" xlink:to="us-gaap_DebtInstrumentAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheBNotesMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShortTermDebtLineItems" xlink:to="us-gaap_UnamortizedDebtIssuanceExpense" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_LineOfCreditFacilityTable" xlink:to="us-gaap_ShortTermDebtLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShortTermDebtLineItems" xlink:to="ck0001899017_DebtInstrumentEffectiveInterestRateSwapHedge" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ShortTermDebtLineItems" xlink:to="us-gaap_LongTermDebt" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnSeries2025SeniorNotesDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt" xlink:label="us-gaap_InterestExpenseDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtDisclosureAbstract" xlink:label="us-gaap_DebtDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheANotesMember" xlink:label="ck0001899017_TrancheANotesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_Series2025SeniorNotesMember" xlink:label="ck0001899017_Series2025SeniorNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBNotesMember" xlink:label="ck0001899017_TrancheBNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DebtInstrumentInterestRateSwaps" xlink:label="ck0001899017_DebtInstrumentInterestRateSwaps"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestExpenseRelatedToHedgedItems" xlink:label="ck0001899017_InterestExpenseRelatedToHedgedItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDebtExpense" xlink:label="us-gaap_InterestAndDebtExpense"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestExpenseDebt" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtDisclosureAbstract" xlink:to="us-gaap_DebtInstrumentTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheANotesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_Series2025SeniorNotesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheBNotesMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_DebtInstrumentInterestRateSwaps" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_InterestExpenseRelatedToHedgedItems" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestAndDebtExpense" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems" xlink:label="us-gaap_DerivativeLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityFairValueOfCollateral" xlink:label="us-gaap_DerivativeLiabilityFairValueOfCollateral"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable" xlink:label="us-gaap_DerivativeTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="us-gaap_ForeignExchangeForwardMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DerivativeInstrumentAverageNotionalAmount" xlink:label="ck0001899017_DerivativeInstrumentAverageNotionalAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember" xlink:label="us-gaap_InterestRateSwapMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency" xlink:label="us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSaleOfDerivatives" xlink:label="us-gaap_GainLossOnSaleOfDerivatives"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet" xlink:label="us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_DerivativeLiabilityFairValueOfCollateral" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:to="us-gaap_DerivativeTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_ForeignExchangeForwardMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeLineItems" xlink:to="ck0001899017_DerivativeInstrumentAverageNotionalAmount" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_DerivativeLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_InterestRateSwapMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_GainLossOnSaleOfDerivatives" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesOffsetOfAssetsAndLiabilitiesDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OffsettingAssetsTable" xlink:label="us-gaap_OffsettingAssetsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis" xlink:label="srt_CounterpartyNameAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OffsettingAssetsLineItems" xlink:label="us-gaap_OffsettingAssetsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAsset"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BankOfNewYorkMember" xlink:label="ck0001899017_BankOfNewYorkMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="us-gaap_ForeignExchangeForwardMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:label="us-gaap_DerivativeFairValueOfDerivativeLiability"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BNPParibasMember" xlink:label="ck0001899017_BNPParibasMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember" xlink:label="us-gaap_InterestRateSwapMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WellsFargoMember" xlink:label="ck0001899017_WellsFargoMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset" xlink:label="us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OffsettingAssetsTable" xlink:to="srt_CounterpartyNameAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:to="us-gaap_OffsettingAssetsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OffsettingAssetsLineItems" xlink:to="us-gaap_DerivativeFairValueOfDerivativeAsset" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="ck0001899017_BankOfNewYorkMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_ForeignExchangeForwardMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OffsettingAssetsTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OffsettingAssetsLineItems" xlink:to="us-gaap_DerivativeFairValueOfDerivativeLiability" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="ck0001899017_BNPParibasMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_InterestRateSwapMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OffsettingAssetsTable" xlink:to="us-gaap_OffsettingAssetsLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OffsettingAssetsLineItems" xlink:to="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="ck0001899017_WellsFargoMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OffsettingAssetsLineItems" xlink:to="us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OffsettingAssetsLineItems" xlink:to="us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesEffectOfTransactionsInDerivativeInstrumentsDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems" xlink:label="us-gaap_DerivativeLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="us-gaap_RealizedInvestmentGainsLosses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable" xlink:label="us-gaap_DerivativeTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="us-gaap_ForeignExchangeForwardMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSaleOfDerivatives" xlink:label="us-gaap_GainLossOnSaleOfDerivatives"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_RealizedInvestmentGainsLosses" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:to="us-gaap_DerivativeTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_ForeignExchangeForwardMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_DerivativeLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_GainLossOnSaleOfDerivatives" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesNetRealizedAndUnrealizedGainsAndLossesDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems" xlink:label="us-gaap_DerivativeLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeGainLossOnDerivativeNet" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain" xlink:label="us-gaap_HedgingDesignationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DesignatedAsHedgingInstrumentMember" xlink:label="us-gaap_DesignatedAsHedgingInstrumentMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis" xlink:label="us-gaap_HedgingDesignationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable" xlink:label="us-gaap_DerivativeTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:label="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember" xlink:label="us-gaap_InterestRateSwapMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration" xlink:label="us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgeFundsMember" xlink:label="us-gaap_HedgeFundsMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_DerivativeGainLossOnDerivativeNet" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_HedgingDesignationDomain" xlink:to="us-gaap_DesignatedAsHedgingInstrumentMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_HedgingDesignationAxis" xlink:to="us-gaap_HedgingDesignationDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentsAndHedgingActivitiesDisclosureAbstract" xlink:to="us-gaap_DerivativeTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_InterestRateSwapMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_HedgingDesignationAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_HedgeFundsMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_DerivativeLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfTransactionsInCommonSharesDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityAbstract" xlink:label="us-gaap_EquityAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="us-gaap_ScheduleOfStockByClassTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockLineItems" xlink:label="us-gaap_ClassOfStockLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassIMember" xlink:label="ck0001899017_CommonClassIMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_StockRepurchasedDuringPeriodIncludingEarlyRepurchaseDeduction" xlink:label="ck0001899017_StockRepurchasedDuringPeriodIncludingEarlyRepurchaseDeduction"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EarlyRepurchaseDeductionValue" xlink:label="ck0001899017_EarlyRepurchaseDeductionValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:label="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:label="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease" xlink:label="us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction" xlink:label="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_ScheduleOfStockByClassTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodSharesNewIssues" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassIMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_StatementClassOfStockAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodValueNewIssues" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_ClassOfStockLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_StockRepurchasedDuringPeriodShares" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="ck0001899017_StockRepurchasedDuringPeriodIncludingEarlyRepurchaseDeduction" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="ck0001899017_EarlyRepurchaseDeductionValue" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfMonthendNavPerShareDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityAbstract" xlink:label="us-gaap_EquityAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="us-gaap_ScheduleOfStockByClassTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockLineItems" xlink:label="us-gaap_ClassOfStockLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetAssetValuePerShare" xlink:label="us-gaap_NetAssetValuePerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassIMember" xlink:label="ck0001899017_CommonClassIMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_ScheduleOfStockByClassTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_NetAssetValuePerShare" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassIMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_StatementClassOfStockAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_ClassOfStockLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfDistributionsDeclaredAndPayableDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityAbstract" xlink:label="us-gaap_EquityAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable" xlink:label="us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDeclarationDate" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDeclarationDate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardDateAxis" xlink:label="us-gaap_AwardDateAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardDateDomain" xlink:label="us-gaap_AwardDateDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeMember" xlink:label="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassIMember" xlink:label="ck0001899017_CommonClassIMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDateOfRecord" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDateOfRecord"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeOneMember" xlink:label="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeOneMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDistributionDate" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDistributionDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineDecemberTwoThousandTwentyThreeMember" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyThreeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit" xlink:label="us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JanuaryThirtyFirstTwoThousandTwentyFourMember" xlink:label="ck0001899017_JanuaryThirtyFirstTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineFebruaryTwoThousandTwentyFourMember" xlink:label="ck0001899017_TwentyNineFebruaryTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineMarchTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_TwentyNineMarchTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ThirtyAprilTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_ThirtyAprilTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ThirtyMayTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_ThirtyMayTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySevenJuneTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_TwentySevenJuneTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SeventeenJulyTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_SeventeenJulyTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyThreeAugustTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_TwentyThreeAugustTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyFifthOctoberTwoThousandTwentyFourMember" xlink:label="ck0001899017_TwentyFifthOctoberTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySecondNovemberTwoThousandTwentyFourMember" xlink:label="ck0001899017_TwentySecondNovemberTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourMember" xlink:label="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourOneMember" xlink:label="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineJanuaryTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentyNineJanuaryTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyFourFebruaryTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentyFourFebruaryTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SeventeenMarchTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_SeventeenMarchTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyFourAprilTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentyFourAprilTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyEightMayTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentyEightMayTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveOneMember" xlink:label="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EighteenJulyTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_EighteenJulyTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySevenAugustTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentySevenAugustTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveOneMember" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SixteenOctoberTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_SixteenOctoberTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySixNovemberTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentySixNovemberTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveMember" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveOneMember" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ThirtyOneJanuaryTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_ThirtyOneJanuaryTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineFebruaryTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_TwentyNineFebruaryTwoThousandAndTwentyFourMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDeclarationDate" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable" xlink:to="us-gaap_AwardDateAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateAxis" xlink:to="us-gaap_AwardDateDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassIMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDateOfRecord" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable" xlink:to="us-gaap_StatementClassOfStockAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeOneMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDistributionDate" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyNineDecemberTwoThousandTwentyThreeMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" xlink:to="us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_JanuaryThirtyFirstTwoThousandTwentyFourMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyNineFebruaryTwoThousandTwentyFourMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyNineMarchTwoThousandAndTwentyFourMember" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_ThirtyAprilTwoThousandAndTwentyFourMember" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_ThirtyMayTwoThousandAndTwentyFourMember" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentySevenJuneTwoThousandAndTwentyFourMember" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_SeventeenJulyTwoThousandAndTwentyFourMember" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyThreeAugustTwoThousandAndTwentyFourMember" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFourMember" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyFifthOctoberTwoThousandTwentyFourMember" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentySecondNovemberTwoThousandTwentyFourMember" order="13" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourMember" order="14" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourOneMember" order="15" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyNineJanuaryTwoThousandAndTwentyFiveMember" order="16" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyFourFebruaryTwoThousandAndTwentyFiveMember" order="17" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_SeventeenMarchTwoThousandAndTwentyFiveMember" order="18" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyFourAprilTwoThousandAndTwentyFiveMember" order="19" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyEightMayTwoThousandAndTwentyFiveMember" order="20" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveMember" order="21" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveOneMember" order="22" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_EighteenJulyTwoThousandAndTwentyFiveMember" order="23" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentySevenAugustTwoThousandAndTwentyFiveMember" order="24" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveMember" order="25" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveOneMember" order="26" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_SixteenOctoberTwoThousandAndTwentyFiveMember" order="27" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentySixNovemberTwoThousandAndTwentyFiveMember" order="28" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveMember" order="29" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveOneMember" order="30" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_ThirtyOneJanuaryTwoThousandAndTwentyFourMember" order="31" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyNineFebruaryTwoThousandAndTwentyFourMember" order="32" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityAbstract" xlink:label="us-gaap_EquityAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="us-gaap_ScheduleOfStockByClassTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockLineItems" xlink:label="us-gaap_ClassOfStockLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesOutstanding" xlink:label="us-gaap_SharesOutstanding"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassSMember" xlink:label="ck0001899017_CommonClassSMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_StockRepurchaseProgramMonthlyRedemptionsPercentOfNetAssetValueMaximum" xlink:label="ck0001899017_StockRepurchaseProgramMonthlyRedemptionsPercentOfNetAssetValueMaximum"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassDMember" xlink:label="ck0001899017_CommonClassDMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ShareRedemptionPriceUsedPercentOfMostRecentlyDisclosedNetAssetValue" xlink:label="ck0001899017_ShareRedemptionPriceUsedPercentOfMostRecentlyDisclosedNetAssetValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_StockRepurchaseProgramHoldingPeriod" xlink:label="ck0001899017_StockRepurchaseProgramHoldingPeriod"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquityAbstract" xlink:to="us-gaap_ScheduleOfStockByClassTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_SharesOutstanding" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassSMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_StatementClassOfStockAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="ck0001899017_StockRepurchaseProgramMonthlyRedemptionsPercentOfNetAssetValueMaximum" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassDMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_ClassOfStockLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="ck0001899017_ShareRedemptionPriceUsedPercentOfMostRecentlyDisclosedNetAssetValue" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="ck0001899017_StockRepurchaseProgramHoldingPeriod" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_StockRepurchasedDuringPeriodShares" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfShareRepurchasesDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityAbstract" xlink:label="us-gaap_EquityAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramTable" xlink:label="srt_ShareRepurchaseProgramTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramAxis" xlink:label="srt_ShareRepurchaseProgramAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramDomain" xlink:label="srt_ShareRepurchaseProgramDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnMarchThreeTwoThousandTwentyFiveMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnMarchThreeTwoThousandTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramLineItems" xlink:label="srt_ShareRepurchaseProgramLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StockRepurchaseProgramExpirationDate" xlink:label="srt_StockRepurchaseProgramExpirationDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnJuneTwoTwoThousandTwentyFiveMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnJuneTwoTwoThousandTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfOutstandingSharesTheCompanyOfferedToRepurchase" xlink:label="ck0001899017_PercentageOfOutstandingSharesTheCompanyOfferedToRepurchase"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnAugustTwentyNineTwoThousandTwentyFiveMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnAugustTwentyNineTwoThousandTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepurchaseAgreementDateOfRepurchase" xlink:label="us-gaap_RepurchaseAgreementDateOfRepurchase"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnDecemberTenTwoThousandTwentyFiveMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnDecemberTenTwoThousandTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnFebruaryTwentyNineTwoThousandTwentyFourMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnFebruaryTwentyNineTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnMayThirtyOneTwoThousandTwentyFourMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnMayThirtyOneTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfOutstandingSharesPurchased" xlink:label="ck0001899017_PercentageOfOutstandingSharesPurchased"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnAugustThirtyOneTwoThousandTwentyFourMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnAugustThirtyOneTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnNovemberThirtyTwoThousandTwentyFourMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnNovemberThirtyTwoThousandTwentyFourMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_EquityAbstract" xlink:to="srt_ShareRepurchaseProgramTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramTable" xlink:to="srt_ShareRepurchaseProgramAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramAxis" xlink:to="srt_ShareRepurchaseProgramDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnMarchThreeTwoThousandTwentyFiveMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramLineItems" xlink:to="srt_StockRepurchaseProgramExpirationDate" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramTable" xlink:to="srt_ShareRepurchaseProgramLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnJuneTwoTwoThousandTwentyFiveMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramLineItems" xlink:to="ck0001899017_PercentageOfOutstandingSharesTheCompanyOfferedToRepurchase" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnAugustTwentyNineTwoThousandTwentyFiveMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramLineItems" xlink:to="us-gaap_RepurchaseAgreementDateOfRepurchase" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnDecemberTenTwoThousandTwentyFiveMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramLineItems" xlink:to="us-gaap_StockRepurchasedDuringPeriodValue" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnFebruaryTwentyNineTwoThousandTwentyFourMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramLineItems" xlink:to="us-gaap_StockRepurchasedDuringPeriodShares" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnMayThirtyOneTwoThousandTwentyFourMember" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramLineItems" xlink:to="ck0001899017_PercentageOfOutstandingSharesPurchased" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnAugustThirtyOneTwoThousandTwentyFourMember" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnNovemberThirtyTwoThousandTwentyFourMember" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="us-gaap_IncomeTaxDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyDistributableEarningsLossAccumulatedShortTermCapitalLossCarryforward" xlink:label="ck0001899017_InvestmentCompanyDistributableEarningsLossAccumulatedShortTermCapitalLossCarryforward"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedCapitalLossCarryforward" xlink:label="us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedCapitalLossCarryforward"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecognizedTaxBenefits" xlink:label="us-gaap_UnrecognizedTaxBenefits"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense" xlink:label="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="ck0001899017_InvestmentCompanyDistributableEarningsLossAccumulatedShortTermCapitalLossCarryforward" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_InvestmentCompanyDistributableEarningsLossAccumulatedCapitalLossCarryforward" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_UnrecognizedTaxBenefits" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_UnrecognizedTaxBenefitsIncomeTaxPenaltiesAndInterestExpense" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxScheduleOfTaxCharacterOfDistributionsDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="us-gaap_IncomeTaxDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDistributionOrdinaryIncome" xlink:label="us-gaap_InvestmentCompanyDistributionOrdinaryIncome"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDistributionLongTermCapitalGain" xlink:label="us-gaap_InvestmentCompanyDistributionLongTermCapitalGain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDividendDistribution" xlink:label="us-gaap_InvestmentCompanyDividendDistribution"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_InvestmentCompanyDistributionOrdinaryIncome" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_InvestmentCompanyDistributionLongTermCapitalGain" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_InvestmentCompanyDividendDistribution" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxScheduleOfReconcilesNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="us-gaap_IncomeTaxDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation" xlink:label="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyTaxBasisExpenseNotDeductible" xlink:label="us-gaap_InvestmentCompanyTaxBasisExpenseNotDeductible"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit" xlink:label="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyTaxBasisIncomeTaxable" xlink:label="us-gaap_InvestmentCompanyTaxBasisIncomeTaxable"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_NetIncomeLoss" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_InvestmentCompanyTaxBasisExpenseNotDeductible" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_InvestmentCompanyTaxBasisIncomeTaxable" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxScheduleOfAggregateUnrealizedAppreciationAndDepreciationOnInvestmentsAndForwardCurrencyExchangeContractsBasedOnCostFor" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeTaxDisclosureAbstract" xlink:label="us-gaap_IncomeTaxDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" xlink:label="us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" xlink:label="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation" xlink:label="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:label="us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_IncomeTaxDisclosureAbstract" xlink:to="us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCommitmentsAndContingenciesSummaryOfUnfundedCommitmentsUnderLoanAndFinancingAgreementsDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="srt_EquityMethodInvesteeNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsLineItems" xlink:label="us-gaap_OtherCommitmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnusedCommitmentsToExtendCredit" xlink:label="us-gaap_UnusedCommitmentsToExtendCredit"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ACAMSMember" xlink:label="ck0001899017_ACAMSMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsTable" xlink:label="us-gaap_OtherCommitmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FirstLienSeniorSecuredLoanMember" xlink:label="ck0001899017_FirstLienSeniorSecuredLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AccidentCareAllianceHoldcoLLCMember" xlink:label="ck0001899017_AccidentCareAllianceHoldcoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RevolverCommitmentMember" xlink:label="ck0001899017_RevolverCommitmentMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AdvancedAircrewMember" xlink:label="ck0001899017_AdvancedAircrewMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DelayedDrawCommitmentMember" xlink:label="ck0001899017_DelayedDrawCommitmentMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AegVisionMember" xlink:label="ck0001899017_AegVisionMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DelayedDrawCommitment1Member" xlink:label="ck0001899017_DelayedDrawCommitment1Member"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AeriTekGlobalCADAcquisitionIncMember" xlink:label="ck0001899017_AeriTekGlobalCADAcquisitionIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DelayedDrawCommitment2Member" xlink:label="ck0001899017_DelayedDrawCommitment2Member"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AgrofreshSolutionsMember" xlink:label="ck0001899017_AgrofreshSolutionsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AGSAmericanGlassServicesAcquisitionLLCMember" xlink:label="ck0001899017_AGSAmericanGlassServicesAcquisitionLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AllbridgeMember" xlink:label="ck0001899017_AllbridgeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AlldentHoldingGmbHMember" xlink:label="ck0001899017_AlldentHoldingGmbHMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AMIMember" xlink:label="ck0001899017_AMIMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AOMInfusionMember" xlink:label="ck0001899017_AOMInfusionMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ApprissMember" xlink:label="ck0001899017_ApprissMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AsprPacAcquisitionCoLlcMember" xlink:label="ck0001899017_AsprPacAcquisitionCoLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AtsMember" xlink:label="ck0001899017_AtsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AvalonBidcoLimitedMember" xlink:label="ck0001899017_AvalonBidcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AwaydayMember" xlink:label="ck0001899017_AwaydayMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BeaconSpecializedLivingMember" xlink:label="ck0001899017_BeaconSpecializedLivingMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BlackbirdPurchaserIncMember" xlink:label="ck0001899017_BlackbirdPurchaserIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BLIBuyerIncMember" xlink:label="ck0001899017_BLIBuyerIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BridgerAerospaceGroupHoldingsIncMember" xlink:label="ck0001899017_BridgerAerospaceGroupHoldingsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BtxPrecisionMember" xlink:label="ck0001899017_BtxPrecisionMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChaseIndustriesIncMember" xlink:label="ck0001899017_ChaseIndustriesIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChexFinerFoodsLLCMember" xlink:label="ck0001899017_ChexFinerFoodsLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChiltonMember" xlink:label="ck0001899017_ChiltonMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChoreoMember" xlink:label="ck0001899017_ChoreoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CityBbqMember" xlink:label="ck0001899017_CityBbqMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CubeMember" xlink:label="ck0001899017_CubeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DiscoverySeniorLivingMember" xlink:label="ck0001899017_DiscoverySeniorLivingMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DtiqTechnologiesIncMember" xlink:label="ck0001899017_DtiqTechnologiesIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DuracoMember" xlink:label="ck0001899017_DuracoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EasyIceLLCMember" xlink:label="ck0001899017_EasyIceLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EasyIceMember" xlink:label="ck0001899017_EasyIceMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EheHealthMember" xlink:label="ck0001899017_EheHealthMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ElectronicMerchantSystemsMember" xlink:label="ck0001899017_ElectronicMerchantSystemsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ElevationNewCoLLCMember" xlink:label="ck0001899017_ElevationNewCoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EngineeredProductsCoLLCMember" xlink:label="ck0001899017_EngineeredProductsCoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ETechGroupMember" xlink:label="ck0001899017_ETechGroupMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EXTAcquisitionsIncMember" xlink:label="ck0001899017_EXTAcquisitionsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FactsGlobalEnergyMember" xlink:label="ck0001899017_FactsGlobalEnergyMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FiduciaireJean-MarcFaberFJMFMember" xlink:label="ck0001899017_FiduciaireJean-MarcFaberFJMFMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FiftyUSBidcoIncMember" xlink:label="ck0001899017_FiftyUSBidcoIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_G702BuyerIncMember" xlink:label="ck0001899017_G702BuyerIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GalanthusGroupHoldingsLimitedMember" xlink:label="ck0001899017_GalanthusGroupHoldingsLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GovineerSolutionsFkaBlackMountainMember" xlink:label="ck0001899017_GovineerSolutionsFkaBlackMountainMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HeadsUpTechnologiesIncMember" xlink:label="ck0001899017_HeadsUpTechnologiesIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HellersMember" xlink:label="ck0001899017_HellersMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HempzMember" xlink:label="ck0001899017_HempzMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HumicAcquisitionHoldingsLLCMember" xlink:label="ck0001899017_HumicAcquisitionHoldingsLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ICATLogisticsIncMember" xlink:label="ck0001899017_ICATLogisticsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_KAMCHoldingsIncMember" xlink:label="ck0001899017_KAMCHoldingsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LindstromLLCMember" xlink:label="ck0001899017_LindstromLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LogrhythmMember" xlink:label="ck0001899017_LogrhythmMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MasterConcessionAirMember" xlink:label="ck0001899017_MasterConcessionAirMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MeteorUKBidcoLimitedMember" xlink:label="ck0001899017_MeteorUKBidcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MonarchFincoLLCMember" xlink:label="ck0001899017_MonarchFincoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NafincoMember" xlink:label="ck0001899017_NafincoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NewMilaniGroupLLCMember" xlink:label="ck0001899017_NewMilaniGroupLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OdysseyBehavioralHealthMember" xlink:label="ck0001899017_OdysseyBehavioralHealthMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OghBidcoLimitedMember" xlink:label="ck0001899017_OghBidcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OwlAcquisitionLLCMember" xlink:label="ck0001899017_OwlAcquisitionLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PayRangeMember" xlink:label="ck0001899017_PayRangeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PcfMember" xlink:label="ck0001899017_PcfMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PharmacyPartnersMember" xlink:label="ck0001899017_PharmacyPartnersMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PlaskolitePPCIntermediateIILLCMember" xlink:label="ck0001899017_PlaskolitePPCIntermediateIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PMAMember" xlink:label="ck0001899017_PMAMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PolloTropicalMember" xlink:label="ck0001899017_PolloTropicalMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PPTGroupMember" xlink:label="ck0001899017_PPTGroupMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PrecisionConceptsParentIncMember" xlink:label="ck0001899017_PrecisionConceptsParentIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PRGXMember" xlink:label="ck0001899017_PRGXMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PsychiatricMedicalCareLLCMember" xlink:label="ck0001899017_PsychiatricMedicalCareLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PureWaferMember" xlink:label="ck0001899017_PureWaferMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_R1RCMIncMember" xlink:label="ck0001899017_R1RCMIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReconomyMember" xlink:label="ck0001899017_ReconomyMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RedNucleusMember" xlink:label="ck0001899017_RedNucleusMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RedMedOperationsCollageRehabilitationMember" xlink:label="ck0001899017_RedMedOperationsCollageRehabilitationMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RetailNextMember" xlink:label="ck0001899017_RetailNextMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RocSkincareMember" xlink:label="ck0001899017_RocSkincareMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SaturnPurchaserCorpMember" xlink:label="ck0001899017_SaturnPurchaserCorpMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SauceCoHoldCoLLCMember" xlink:label="ck0001899017_SauceCoHoldCoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SensortowerMember" xlink:label="ck0001899017_SensortowerMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SimplicityMember" xlink:label="ck0001899017_SimplicityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SolairusMember" xlink:label="ck0001899017_SolairusMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VesscoWaterMember" xlink:label="ck0001899017_VesscoWaterMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AdvancedAircrewAcademyLlcMember" xlink:label="ck0001899017_AdvancedAircrewAcademyLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AlertSRCNewcoMember" xlink:label="ck0001899017_AlertSRCNewcoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AllbridgeLlcMember" xlink:label="ck0001899017_AllbridgeLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AllworthFinancialGroupLpMember" xlink:label="ck0001899017_AllworthFinancialGroupLpMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AMIBuyerIncMember" xlink:label="ck0001899017_AMIBuyerIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ApolloIntelligenceMember" xlink:label="ck0001899017_ApolloIntelligenceMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AviationTechnicalServicesIncMember" xlink:label="ck0001899017_AviationTechnicalServicesIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CityBarbequeLlcMember" xlink:label="ck0001899017_CityBarbequeLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConcessionsDevelopmentGroupLLCMember" xlink:label="ck0001899017_ConcessionsDevelopmentGroupLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CorePowerYogaLLCMember" xlink:label="ck0001899017_CorePowerYogaLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CRHHealthcarePurchaserIncMember" xlink:label="ck0001899017_CRHHealthcarePurchaserIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ElectronicMerchantSystemsLlcMember" xlink:label="ck0001899017_ElectronicMerchantSystemsLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EraIndustriesLlcMember" xlink:label="ck0001899017_EraIndustriesLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FiestaHoldingsLLCMember" xlink:label="ck0001899017_FiestaHoldingsLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FoyleBidcoLimitedMember" xlink:label="ck0001899017_FoyleBidcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GovineerSolutionsLLCMember" xlink:label="ck0001899017_GovineerSolutionsLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HeliosServicePartnersLLCMember" xlink:label="ck0001899017_HeliosServicePartnersLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HlrsHoldcoLimitedMember" xlink:label="ck0001899017_HlrsHoldcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JhccHoldingsLlcMember" xlink:label="ck0001899017_JhccHoldingsLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LagerboxMember" xlink:label="ck0001899017_LagerboxMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LogrhythmIncMember" xlink:label="ck0001899017_LogrhythmIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OrionMidcoLLCMember" xlink:label="ck0001899017_OrionMidcoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PayRangeLLCMember" xlink:label="ck0001899017_PayRangeLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PBIGroupLLCMember" xlink:label="ck0001899017_PBIGroupLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PinnacleAcquisitionLLCMember" xlink:label="ck0001899017_PinnacleAcquisitionLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PMAParentHoldingsLLCMember" xlink:label="ck0001899017_PMAParentHoldingsLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RetailNextHoldingsIncMember" xlink:label="ck0001899017_RetailNextHoldingsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RNEnterprisesLLCMember" xlink:label="ck0001899017_RNEnterprisesLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SpotlessBrandsLlcMember" xlink:label="ck0001899017_SpotlessBrandsLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubstantialHoldcoLimitedMember" xlink:label="ck0001899017_SubstantialHoldcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SummerFridaysLLCMember" xlink:label="ck0001899017_SummerFridaysLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TartanBidcoPtyLtdMember" xlink:label="ck0001899017_TartanBidcoPtyLtdMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VasaFitnessLLCMember" xlink:label="ck0001899017_VasaFitnessLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VaticaHealthIncMember" xlink:label="ck0001899017_VaticaHealthIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VacationRentalBrandsLlcMember" xlink:label="ck0001899017_VacationRentalBrandsLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VesscoMidcoHoldingsLlcMember" xlink:label="ck0001899017_VesscoMidcoHoldingsLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VitalPurchaserLlcMember" xlink:label="ck0001899017_VitalPurchaserLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WealthEnhancementGroupWegMember" xlink:label="ck0001899017_WealthEnhancementGroupWegMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WSHPCottonwoodBuyerLLCMember" xlink:label="ck0001899017_WSHPCottonwoodBuyerLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WPEFIXBidco23BVFkaKeystoneBidcoBVMember" xlink:label="ck0001899017_WPEFIXBidco23BVFkaKeystoneBidcoBVMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WUHoldcoIncMember" xlink:label="ck0001899017_WUHoldcoIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ZeusFireSecurityMember" xlink:label="ck0001899017_ZeusFireSecurityMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="srt_EquityMethodInvesteeNameDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OtherCommitmentsLineItems" xlink:to="us-gaap_UnusedCommitmentsToExtendCredit" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ACAMSMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OtherCommitmentsTable" xlink:to="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_FirstLienSeniorSecuredLoanMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="us-gaap_OtherCommitmentsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AccidentCareAllianceHoldcoLLCMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OtherCommitmentsTable" xlink:to="us-gaap_FinancialInstrumentAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_RevolverCommitmentMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AdvancedAircrewMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_OtherCommitmentsTable" xlink:to="us-gaap_OtherCommitmentsLineItems" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_DelayedDrawCommitmentMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AegVisionMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_DelayedDrawCommitment1Member" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AeriTekGlobalCADAcquisitionIncMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_DelayedDrawCommitment2Member" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AgrofreshSolutionsMember" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AGSAmericanGlassServicesAcquisitionLLCMember" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AllbridgeMember" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AlldentHoldingGmbHMember" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AMIMember" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AOMInfusionMember" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ApprissMember" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AsprPacAcquisitionCoLlcMember" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AtsMember" order="13" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AvalonBidcoLimitedMember" order="14" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AwaydayMember" order="15" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BeaconSpecializedLivingMember" order="16" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BlackbirdPurchaserIncMember" order="17" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BLIBuyerIncMember" order="18" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BridgerAerospaceGroupHoldingsIncMember" order="19" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BtxPrecisionMember" order="20" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ChaseIndustriesIncMember" order="21" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ChexFinerFoodsLLCMember" order="22" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ChiltonMember" order="23" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ChoreoMember" order="24" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_CityBbqMember" order="25" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_CubeMember" order="26" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_DiscoverySeniorLivingMember" order="27" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_DtiqTechnologiesIncMember" order="28" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_DuracoMember" order="29" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_EasyIceLLCMember" order="30" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_EasyIceMember" order="31" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_EheHealthMember" order="32" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ElectronicMerchantSystemsMember" order="33" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ElevationNewCoLLCMember" order="34" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_EngineeredProductsCoLLCMember" order="35" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ETechGroupMember" order="36" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_EXTAcquisitionsIncMember" order="37" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_FactsGlobalEnergyMember" order="38" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_FiduciaireJean-MarcFaberFJMFMember" order="39" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_FiftyUSBidcoIncMember" order="40" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_G702BuyerIncMember" order="41" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_GalanthusGroupHoldingsLimitedMember" order="42" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_GovineerSolutionsFkaBlackMountainMember" order="43" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_HeadsUpTechnologiesIncMember" order="44" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_HellersMember" order="45" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_HempzMember" order="46" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_HumicAcquisitionHoldingsLLCMember" order="47" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ICATLogisticsIncMember" order="48" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_KAMCHoldingsIncMember" order="49" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_LindstromLLCMember" order="50" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_LogrhythmMember" order="51" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_MasterConcessionAirMember" order="52" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_MeteorUKBidcoLimitedMember" order="53" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_MonarchFincoLLCMember" order="54" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_NafincoMember" order="55" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_NewMilaniGroupLLCMember" order="56" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_OdysseyBehavioralHealthMember" order="57" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_OghBidcoLimitedMember" order="58" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_OwlAcquisitionLLCMember" order="59" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PayRangeMember" order="60" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PcfMember" order="61" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PharmacyPartnersMember" order="62" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PlaskolitePPCIntermediateIILLCMember" order="63" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PMAMember" order="64" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PolloTropicalMember" order="65" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PPTGroupMember" order="66" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PrecisionConceptsParentIncMember" order="67" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PRGXMember" order="68" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PsychiatricMedicalCareLLCMember" order="69" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PureWaferMember" order="70" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_R1RCMIncMember" order="71" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ReconomyMember" order="72" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_RedNucleusMember" order="73" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_RedMedOperationsCollageRehabilitationMember" order="74" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_RetailNextMember" order="75" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_RocSkincareMember" order="76" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SaturnPurchaserCorpMember" order="77" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SauceCoHoldCoLLCMember" order="78" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SensortowerMember" order="79" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SimplicityMember" order="80" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SolairusMember" order="81" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_VesscoWaterMember" order="82" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AdvancedAircrewAcademyLlcMember" order="83" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AlertSRCNewcoMember" order="84" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AllbridgeLlcMember" order="85" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AllworthFinancialGroupLpMember" order="86" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AMIBuyerIncMember" order="87" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ApolloIntelligenceMember" order="88" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AviationTechnicalServicesIncMember" order="89" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_CityBarbequeLlcMember" order="90" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ConcessionsDevelopmentGroupLLCMember" order="91" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_CorePowerYogaLLCMember" order="92" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_CRHHealthcarePurchaserIncMember" order="93" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ElectronicMerchantSystemsLlcMember" order="94" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_EraIndustriesLlcMember" order="95" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_FiestaHoldingsLLCMember" order="96" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_FoyleBidcoLimitedMember" order="97" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_GovineerSolutionsLLCMember" order="98" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_HeliosServicePartnersLLCMember" order="99" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_HlrsHoldcoLimitedMember" order="100" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_JhccHoldingsLlcMember" order="101" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_LagerboxMember" order="102" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_LogrhythmIncMember" order="103" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_OrionMidcoLLCMember" order="104" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PayRangeLLCMember" order="105" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PBIGroupLLCMember" order="106" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PinnacleAcquisitionLLCMember" order="107" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PMAParentHoldingsLLCMember" order="108" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_RetailNextHoldingsIncMember" order="109" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_RNEnterprisesLLCMember" order="110" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SpotlessBrandsLlcMember" order="111" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SubstantialHoldcoLimitedMember" order="112" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SummerFridaysLLCMember" order="113" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_TartanBidcoPtyLtdMember" order="114" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_VasaFitnessLLCMember" order="115" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_VaticaHealthIncMember" order="116" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_VacationRentalBrandsLlcMember" order="117" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_VesscoMidcoHoldingsLlcMember" order="118" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_VitalPurchaserLlcMember" order="119" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_WealthEnhancementGroupWegMember" order="120" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_WSHPCottonwoodBuyerLLCMember" order="121" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_WPEFIXBidco23BVFkaKeystoneBidcoBVMember" order="122" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_WUHoldcoIncMember" order="123" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ZeusFireSecurityMember" order="124" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCommitmentsAndContingenciesDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:label="us-gaap_CommitmentsAndContingenciesDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnusedCommitmentsToExtendCredit" xlink:label="us-gaap_UnusedCommitmentsToExtendCredit"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CommitmentsAndContingenciesDisclosureAbstract" xlink:to="us-gaap_UnusedCommitmentsToExtendCredit" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFinancialHighlightsScheduleOfFinancialHighlightsDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShareAbstract" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShareAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassISharesMember" xlink:label="ck0001899017_ClassISharesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetAssetValuePerShare" xlink:label="us-gaap_NetAssetValuePerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:label="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDistributionToShareholdersPerShare" xlink:label="us-gaap_InvestmentCompanyDistributionToShareholdersPerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetAssetValuePerShare" xlink:label="us-gaap_NetAssetValuePerShare_6"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyTotalReturn" xlink:label="us-gaap_InvestmentCompanyTotalReturn"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesOutstanding" xlink:label="us-gaap_SharesOutstanding"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialRatiosAbstract" xlink:label="us-gaap_InvestmentCompanyFinancialRatiosAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNet" xlink:label="us-gaap_AssetsNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossRatio"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyExpenseRatioIncludingVoluntaryFeeWaiver" xlink:label="us-gaap_InvestmentCompanyExpenseRatioIncludingVoluntaryFeeWaiver"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyPortfolioTurnover" xlink:label="us-gaap_InvestmentCompanyPortfolioTurnover"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_InvestmentCompanyFinancialHighlightsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShareAbstract" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:to="us-gaap_StatementClassOfStockAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassISharesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_NetAssetValuePerShare" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodStartLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:to="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/totalLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyDistributionToShareholdersPerShare" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2009/role/negatedLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_NetAssetValuePerShare_6" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyTotalReturn" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_SharesOutstanding" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/periodEndLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyFinancialRatiosAbstract" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_AssetsNet" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" order="13" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyExpenseRatioIncludingVoluntaryFeeWaiver" order="14" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyPortfolioTurnover" order="15" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFinancialHighlightsScheduleOfFinancialHighlightsParentheticalDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementOfFinancialPositionAbstract" xlink:label="us-gaap_StatementOfFinancialPositionAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyExpenseRatioBeforeIncentiveAllocation" xlink:label="us-gaap_InvestmentCompanyExpenseRatioBeforeIncentiveAllocation"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassISharesMember" xlink:label="ck0001899017_ClassISharesMember"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementOfFinancialPositionAbstract" xlink:to="us-gaap_InvestmentCompanyFinancialHighlightsTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyExpenseRatioBeforeIncentiveAllocation" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:to="us-gaap_StatementClassOfStockAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassISharesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:to="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSelectedQuarterlyFinancialDataUnauditedScheduleOfSelectedQuarterlyFinancialDataUnauditedDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:label="us-gaap_QuarterlyFinancialInformationDisclosureAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossInvestmentIncomeOperating" xlink:label="us-gaap_GrossInvestmentIncomeOperating"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetInvestmentIncome" xlink:label="us-gaap_NetInvestmentIncome"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:label="us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:label="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:label="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareBasic" xlink:label="us-gaap_EarningsPerShareBasic"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EarningsPerShareDiluted" xlink:label="us-gaap_EarningsPerShareDiluted"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NetAssetAndLiabilitiesPerShare" xlink:label="ck0001899017_NetAssetAndLiabilitiesPerShare"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:to="us-gaap_GrossInvestmentIncomeOperating" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:to="us-gaap_NetInvestmentIncome" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:to="us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:to="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:to="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:to="us-gaap_NetIncomeLoss" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:to="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:to="us-gaap_EarningsPerShareBasic" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:to="us-gaap_EarningsPerShareDiluted" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_QuarterlyFinancialInformationDisclosureAbstract" xlink:to="ck0001899017_NetAssetAndLiabilitiesPerShare" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureWarehousingTransactionDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WarehousingTransactionAbstract" xlink:label="ck0001899017_WarehousingTransactionAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="us-gaap_TypeOfArrangementAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FacilityAgreementsMember" xlink:label="ck0001899017_FacilityAgreementsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain" xlink:label="us-gaap_VariableRateDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis" xlink:label="srt_CounterpartyNameAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateAxis" xlink:label="us-gaap_VariableRateAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForPeriodFromClosingDateToOneMonthAnniversaryOfClosingDateMember" xlink:label="ck0001899017_ForPeriodFromClosingDateToOneMonthAnniversaryOfClosingDateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:label="us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FinancingProviderMember" xlink:label="ck0001899017_FinancingProviderMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForPeriodFromOneMonthAnniversaryOfClosingDateToTwoMonthAnniversaryOfClosingDateMember" xlink:label="ck0001899017_ForPeriodFromOneMonthAnniversaryOfClosingDateToTwoMonthAnniversaryOfClosingDateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PurchasePrice" xlink:label="ck0001899017_PurchasePrice"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForPeriodFromTwoMonthAnniversaryOfClosingDateToThreeMonthAnniversaryOfClosingDateMember" xlink:label="ck0001899017_ForPeriodFromTwoMonthAnniversaryOfClosingDateToThreeMonthAnniversaryOfClosingDateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DebtInvestmentAmountOfUnfundedRevolversDelayedDrawposition" xlink:label="ck0001899017_DebtInvestmentAmountOfUnfundedRevolversDelayedDrawposition"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForPeriodFromThreeMonthAnniversaryOfClosingDateToFacilitiesEndDateMember" xlink:label="ck0001899017_ForPeriodFromThreeMonthAnniversaryOfClosingDateToFacilitiesEndDateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="us-gaap_UnrealizedGainLossOnInvestments"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OnOrAfterFacilitiesEndDateMember" xlink:label="ck0001899017_OnOrAfterFacilitiesEndDateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestReceivable" xlink:label="us-gaap_InterestReceivable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NumberOfFacilityAgreements" xlink:label="ck0001899017_NumberOfFacilityAgreements"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MinimumSubscriptionsForForwardObligationToPurchasePortfolioInvestments" xlink:label="ck0001899017_MinimumSubscriptionsForForwardObligationToPurchasePortfolioInvestments"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MaximumFinancingCommitmentAmount" xlink:label="ck0001899017_MaximumFinancingCommitmentAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DividerAmountToDetermineFee" xlink:label="ck0001899017_DividerAmountToDetermineFee"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfMinimumUtilizationFee" xlink:label="ck0001899017_PercentageOfMinimumUtilizationFee"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfMinimumUtilizationThreshold" xlink:label="ck0001899017_PercentageOfMinimumUtilizationThreshold"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentBasisSpreadVariableRate" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" xlink:label="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="ck0001899017_WarehousingTransactionAbstract" xlink:to="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_TypeOfArrangementAxis" xlink:to="us-gaap_ArrangementsAndNonarrangementTransactionsMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:to="ck0001899017_FacilityAgreementsMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_VariableRateDomain" xlink:to="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_VariableRateAxis" xlink:to="us-gaap_VariableRateDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="ck0001899017_ForPeriodFromClosingDateToOneMonthAnniversaryOfClosingDateMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:to="us-gaap_TypeOfArrangementAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_DebtInstrumentFaceAmount" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="ck0001899017_FinancingProviderMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="ck0001899017_ForPeriodFromOneMonthAnniversaryOfClosingDateToTwoMonthAnniversaryOfClosingDateMember" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:to="us-gaap_VariableRateAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_PurchasePrice" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="ck0001899017_ForPeriodFromTwoMonthAnniversaryOfClosingDateToThreeMonthAnniversaryOfClosingDateMember" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:to="srt_CounterpartyNameAxis" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_DebtInvestmentAmountOfUnfundedRevolversDelayedDrawposition" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="ck0001899017_ForPeriodFromThreeMonthAnniversaryOfClosingDateToFacilitiesEndDateMember" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:to="srt_StatementScenarioAxis" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_UnrealizedGainLossOnInvestments" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="ck0001899017_OnOrAfterFacilitiesEndDateMember" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:to="us-gaap_AccountsNotesAndLoansReceivableLineItems" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_InterestReceivable" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_NumberOfFacilityAgreements" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_MinimumSubscriptionsForForwardObligationToPurchasePortfolioInvestments" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_MaximumFinancingCommitmentAmount" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_DividerAmountToDetermineFee" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_PercentageOfMinimumUtilizationFee" order="10" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_PercentageOfMinimumUtilizationThreshold" order="11" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_InvestmentBasisSpreadVariableRate" order="12" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" order="13" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
        </link:presentationLink>
        <link:presentationLink xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSubsequentEventsDetails" xlink:title="presentationLink" xlink:type="extended">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventLineItems" xlink:label="us-gaap_SubsequentEventLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="us-gaap_SubsequentEventTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember" xlink:label="us-gaap_SubsequentEventMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTable" xlink:label="us-gaap_SubsequentEventTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="us-gaap_SubsequentEventTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventsAbstract" xlink:label="us-gaap_SubsequentEventsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassISharesMember" xlink:label="ck0001899017_ClassISharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfShareRepurchases" xlink:label="ck0001899017_PercentageOfShareRepurchases"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StockRepurchaseProgramExpirationDate" xlink:label="srt_StockRepurchaseProgramExpirationDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SharesValidlyTenderedForRepurchase" xlink:label="ck0001899017_SharesValidlyTenderedForRepurchase"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfSharesValidlyTendered" xlink:label="ck0001899017_PercentageOfSharesValidlyTendered"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FourthAmendedAndRestatedDeclarationOfTrustTerm" xlink:label="ck0001899017_FourthAmendedAndRestatedDeclarationOfTrustTerm"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmendedAndRestatedBylawsDescription" xlink:label="ck0001899017_AmendedAndRestatedBylawsDescription"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesSubscriptions" xlink:label="us-gaap_CommonStockSharesSubscriptions"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_CommonStockDividendsPerShareDeclared" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_SmbcRevolvingCreditFacilityMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_SubsequentEventTypeAxis" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeDomain" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventsAbstract" xlink:to="us-gaap_SubsequentEventTable" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassISharesMember" order="0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="ck0001899017_PercentageOfShareRepurchases" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_StatementClassOfStockAxis" order="1" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="srt_StockRepurchaseProgramExpirationDate" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" order="2.0" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_CreditFacilityAxis" order="2" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="ck0001899017_SharesValidlyTenderedForRepurchase" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_SubsequentEventLineItems" order="3" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/label"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="ck0001899017_PercentageOfSharesValidlyTendered" order="4" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" order="5" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/verboseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="ck0001899017_FourthAmendedAndRestatedDeclarationOfTrustTerm" order="6" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="ck0001899017_AmendedAndRestatedBylawsDescription" order="7" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_CommonStockSharesSubscriptions" order="8" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
          <link:presentationArc xlink:type="arc" xlink:arcrole="http://www.xbrl.org/2003/arcrole/parent-child" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_CommonStockSharesIssued" order="9" priority="2" use="optional" preferredLabel="http://www.xbrl.org/2003/role/terseLabel"/>
        </link:presentationLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DocumentDocumentAndEntityInformation">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationLineItems" xlink:label="dei_DocumentInformationLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentInformationTable" xlink:label="dei_DocumentInformationTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentType" xlink:label="dei_DocumentType"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassSMember" xlink:label="ck0001899017_CommonClassSMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentAnnualReport" xlink:label="dei_DocumentAnnualReport"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassDMember" xlink:label="ck0001899017_CommonClassDMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentQuarterlyReport" xlink:label="dei_DocumentQuarterlyReport"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassIMember" xlink:label="ck0001899017_CommonClassIMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentTransitionReport" xlink:label="dei_DocumentTransitionReport"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFileNumber" xlink:label="dei_EntityFileNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentPeriodEndDate" xlink:label="dei_DocumentPeriodEndDate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityRegistrantName" xlink:label="dei_EntityRegistrantName"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityIncorporationStateCountryCode" xlink:label="dei_EntityIncorporationStateCountryCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityTaxIdentificationNumber" xlink:label="dei_EntityTaxIdentificationNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressStateOrProvince" xlink:label="dei_EntityAddressStateOrProvince"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine1" xlink:label="dei_EntityAddressAddressLine1"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressAddressLine2" xlink:label="dei_EntityAddressAddressLine2"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressCityOrTown" xlink:label="dei_EntityAddressCityOrTown"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityAddressPostalZipCode" xlink:label="dei_EntityAddressPostalZipCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CityAreaCode" xlink:label="dei_CityAreaCode"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_LocalPhoneNumber" xlink:label="dei_LocalPhoneNumber"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_Security12bTitle" xlink:label="dei_Security12bTitle"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_TradingSymbol" xlink:label="dei_TradingSymbol"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_SecurityExchangeName" xlink:label="dei_SecurityExchangeName"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityWellKnownSeasonedIssuer" xlink:label="dei_EntityWellKnownSeasonedIssuer"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityVoluntaryFilers" xlink:label="dei_EntityVoluntaryFilers"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCurrentReportingStatus" xlink:label="dei_EntityCurrentReportingStatus"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityInteractiveDataCurrent" xlink:label="dei_EntityInteractiveDataCurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityFilerCategory" xlink:label="dei_EntityFilerCategory"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntitySmallBusiness" xlink:label="dei_EntitySmallBusiness"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityEmergingGrowthCompany" xlink:label="dei_EntityEmergingGrowthCompany"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityExTransitionPeriod" xlink:label="dei_EntityExTransitionPeriod"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_IcfrAuditorAttestationFlag" xlink:label="dei_IcfrAuditorAttestationFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityShellCompany" xlink:label="dei_EntityShellCompany"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityPublicFloat" xlink:label="dei_EntityPublicFloat"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCommonStockSharesOutstanding" xlink:label="dei_EntityCommonStockSharesOutstanding"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_EntityCentralIndexKey" xlink:label="dei_EntityCentralIndexKey"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_CurrentFiscalYearEndDate" xlink:label="dei_CurrentFiscalYearEndDate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalYearFocus" xlink:label="dei_DocumentFiscalYearFocus"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFiscalPeriodFocus" xlink:label="dei_DocumentFiscalPeriodFocus"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AmendmentFlag" xlink:label="dei_AmendmentFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentFinStmtErrorCorrectionFlag" xlink:label="dei_DocumentFinStmtErrorCorrectionFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_DocumentsIncorporatedByReferenceTextBlock" xlink:label="dei_DocumentsIncorporatedByReferenceTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorName" xlink:label="dei_AuditorName"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorLocation" xlink:label="dei_AuditorLocation"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorFirmId" xlink:label="dei_AuditorFirmId"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/dei/2025/dei-2025.xsd#dei_AuditorOpinionTextBlock" xlink:label="dei_AuditorOpinionTextBlock"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentInformationTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentType" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="dei_DocumentInformationTable" xlink:to="us-gaap_StatementClassOfStockAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassSMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentAnnualReport" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassDMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentQuarterlyReport" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassIMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentTransitionReport" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityFileNumber" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentPeriodEndDate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityRegistrantName" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityIncorporationStateCountryCode" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityTaxIdentificationNumber" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressStateOrProvince" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressAddressLine1" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressAddressLine2" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressCityOrTown" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="13" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityAddressPostalZipCode" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="14" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_CityAreaCode" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="15" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_LocalPhoneNumber" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="16" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_Security12bTitle" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="17" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_TradingSymbol" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="18" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_SecurityExchangeName" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="19" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityWellKnownSeasonedIssuer" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="20" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityVoluntaryFilers" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="21" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityCurrentReportingStatus" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="22" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityInteractiveDataCurrent" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="23" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityFilerCategory" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="24" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntitySmallBusiness" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="25" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityEmergingGrowthCompany" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="26" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityExTransitionPeriod" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="27" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_IcfrAuditorAttestationFlag" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="28" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityShellCompany" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="29" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityPublicFloat" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="30" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityCommonStockSharesOutstanding" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="31" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_EntityCentralIndexKey" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="32" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_CurrentFiscalYearEndDate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="33" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentFiscalYearFocus" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="34" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentFiscalPeriodFocus" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="35" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AmendmentFlag" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="36" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentFinStmtErrorCorrectionFlag" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="37" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_DocumentsIncorporatedByReferenceTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="38" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AuditorName" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="39" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AuditorLocation" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="40" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AuditorFirmId" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="41" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="dei_DocumentInformationLineItems" xlink:to="dei_AuditorOpinionTextBlock" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfAssetsAndLiabilities1">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationAxis" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsAbstract" xlink:label="us-gaap_AssetsAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityAbstract" xlink:label="us-gaap_StockholdersEquityAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAbstract" xlink:label="us-gaap_LiabilitiesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:label="us-gaap_InvestmentUnaffiliatedIssuerMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalanceAbstract" xlink:label="us-gaap_InvestmentOwnedBalanceAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_AffiliatedEntityMember" xlink:label="srt_AffiliatedEntityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="us-gaap_AdditionalPaidInCapital"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionPayable" xlink:label="us-gaap_DistributionPayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="us-gaap_CommitmentsAndContingencies"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerControlledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashHeldInForeignCurrency" xlink:label="us-gaap_CashHeldInForeignCurrency"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayable" xlink:label="us-gaap_IncentiveFeePayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeCollateralRightToReclaimCash" xlink:label="us-gaap_DerivativeCollateralRightToReclaimCash"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayableIncomeBased" xlink:label="us-gaap_IncentiveFeePayableIncomeBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalents" xlink:label="us-gaap_RestrictedCashAndCashEquivalents"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNet" xlink:label="us-gaap_AssetsNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayableCapitalGainBased" xlink:label="us-gaap_IncentiveFeePayableCapitalGainBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingAssetsCurrent" xlink:label="us-gaap_HedgingAssetsCurrent"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NetAssetCommonStockValue" xlink:label="ck0001899017_NetAssetCommonStockValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseOfCommonSharesPayable" xlink:label="ck0001899017_RepurchaseOfCommonSharesPayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="us-gaap_DeferredFinanceCostsNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetAssetValuePerShare" xlink:label="us-gaap_NetAssetValuePerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementFeePayable" xlink:label="us-gaap_ManagementFeePayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestReceivable" xlink:label="us-gaap_InterestReceivable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:label="us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsReceivable" xlink:label="us-gaap_DividendsReceivable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilities" xlink:label="us-gaap_DerivativeLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssets" xlink:label="us-gaap_DerivativeAssets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PayableInvestmentPurchase" xlink:label="us-gaap_PayableInvestmentPurchase"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableInvestmentSale" xlink:label="us-gaap_ReceivableInvestmentSale"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidInsurance" xlink:label="us-gaap_PrepaidInsurance"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PrepaidFinancingCosts" xlink:label="ck0001899017_PrepaidFinancingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherReceivables" xlink:label="us-gaap_OtherReceivables"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_InvestmentIssuerAffiliationAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_AssetsAbstract" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_CommonStockValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_LongTermDebt" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentUnaffiliatedIssuerMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="us-gaap_InvestmentIssuerAffiliationDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="us-gaap_InvestmentIssuerAffiliationDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AssetsAbstract" xlink:to="us-gaap_InvestmentOwnedBalanceAbstract" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="srt_AffiliatedEntityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_InvestmentOwnedAtFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_LiabilitiesAbstract" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_AdditionalPaidInCapital" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_DistributionPayable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_CommitmentsAndContingencies" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_InterestPayableCurrentAndNoncurrent" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerControlledMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_CashHeldInForeignCurrency" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StockholdersEquityAbstract" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StockholdersEquityAbstract" xlink:to="us-gaap_StockholdersEquity" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_IncentiveFeePayable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_DerivativeCollateralRightToReclaimCash" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_IncentiveFeePayableIncomeBased" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_RestrictedCashAndCashEquivalents" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_AssetsNet" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_IncentiveFeePayableCapitalGainBased" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_HedgingAssetsCurrent" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="ck0001899017_NetAssetCommonStockValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="ck0001899017_RepurchaseOfCommonSharesPayable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_DeferredFinanceCostsNet" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_NetAssetValuePerShare" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_ManagementFeePayable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_InterestReceivable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_AccruedLiabilitiesAndOtherLiabilities" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_DividendsReceivable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_DerivativeLiabilities" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_DerivativeAssets" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_PayableInvestmentPurchase" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_ReceivableInvestmentSale" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_LiabilitiesAbstract" xlink:to="us-gaap_Liabilities" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_PrepaidInsurance" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="ck0001899017_PrepaidFinancingCosts" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="13" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_OtherReceivables" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="14" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentOwnedBalanceAbstract" xlink:to="us-gaap_Assets" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfAssetsAndLiabilitiesParenthetical">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationAxis" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassOneSharesMember" xlink:label="ck0001899017_ClassOneSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashHeldInForeignCurrencyAcquisitionCost" xlink:label="us-gaap_CashHeldInForeignCurrencyAcquisitionCost"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:label="us-gaap_InvestmentUnaffiliatedIssuerMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetTypeExtensibleList" xlink:label="us-gaap_DerivativeAssetTypeExtensibleList"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerControlledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedAmortizationDeferredFinanceCosts" xlink:label="us-gaap_AccumulatedAmortizationDeferredFinanceCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentUnamortizedDiscount" xlink:label="us-gaap_DebtInstrumentUnamortizedDiscount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesAuthorizedUnlimited" xlink:label="us-gaap_CommonStockSharesAuthorizedUnlimited"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="us-gaap_InvestmentIssuerAffiliationDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentIssuerAffiliationAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassOneSharesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_CashHeldInForeignCurrencyAcquisitionCost" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentUnaffiliatedIssuerMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_StatementClassOfStockAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeAssetTypeExtensibleList" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerControlledMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_AccumulatedAmortizationDeferredFinanceCosts" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DebtInstrumentUnamortizedDiscount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_CommonStockSharesAuthorizedUnlimited" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_CommonStockSharesIssued" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_CommonStockSharesOutstanding" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfOperations">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementLineItems" xlink:label="us-gaap_StatementLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementTable" xlink:label="us-gaap_StatementTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationAxis" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RevenuesAbstract" xlink:label="us-gaap_RevenuesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:label="us-gaap_RealizedInvestmentGainsLossesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="us-gaap_RealizedInvestmentGainsLosses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:label="us-gaap_InvestmentUnaffiliatedIssuerMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:label="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeOperatingPaidInCash" xlink:label="us-gaap_InterestIncomeOperatingPaidInCash"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossRealized" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossRealized"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeeExpenseIncomeBased" xlink:label="us-gaap_IncentiveFeeExpenseIncomeBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendIncomeOperatingPaidInCash" xlink:label="us-gaap_DividendIncomeOperatingPaidInCash"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetInvestmentIncome" xlink:label="us-gaap_NetInvestmentIncome"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt" xlink:label="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerControlledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeeExpenseCapitalGainBased" xlink:label="us-gaap_IncentiveFeeExpenseCapitalGainBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDividendIncomeOperatingPaidInKind" xlink:label="us-gaap_InterestAndDividendIncomeOperatingPaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:label="us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSaleOfDerivatives" xlink:label="us-gaap_GainLossOnSaleOfDerivatives"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ProfessionalFeesAndOperatingExpenses" xlink:label="ck0001899017_ProfessionalFeesAndOperatingExpenses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherIncome" xlink:label="us-gaap_OtherIncome"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:label="us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementFeeExpense" xlink:label="us-gaap_ManagementFeeExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossInvestmentIncomeOperating" xlink:label="us-gaap_GrossInvestmentIncomeOperating"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax" xlink:label="ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfDeferredCharges" xlink:label="us-gaap_AmortizationOfDeferredCharges"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeOperating" xlink:label="us-gaap_InterestIncomeOperating"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TrusteeFees" xlink:label="us-gaap_TrusteeFees"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" xlink:label="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OrganizationCosts" xlink:label="ck0001899017_OrganizationCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:label="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherGeneralAndAdministrativeExpense" xlink:label="us-gaap_OtherGeneralAndAdministrativeExpense"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" xlink:label="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyContractualFeeWaived" xlink:label="us-gaap_InvestmentCompanyContractualFeeWaived"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyVoluntaryFeeWaived" xlink:label="us-gaap_InvestmentCompanyVoluntaryFeeWaived"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyExpenseRecoupmentSupport" xlink:label="ck0001899017_InvestmentCompanyExpenseRecoupmentSupport"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement" xlink:label="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_StatementTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_StatementTable" xlink:to="us-gaap_InvestmentIssuerAffiliationAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_RevenuesAbstract" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_RealizedInvestmentGainsLosses" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentUnaffiliatedIssuerMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="us-gaap_InvestmentIssuerAffiliationDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_InterestExpense" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_InterestIncomeOperatingPaidInCash" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_ForeignCurrencyTransactionGainLossRealized" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_IncentiveFeeExpenseIncomeBased" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_DividendIncomeOperatingPaidInCash" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_NetInvestmentIncome" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerControlledMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_IncentiveFeeExpenseCapitalGainBased" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_InterestAndDividendIncomeOperatingPaidInKind" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_GainLossOnSaleOfDerivatives" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="ck0001899017_ProfessionalFeesAndOperatingExpenses" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_OtherIncome" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_ManagementFeeExpense" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_GrossInvestmentIncomeOperating" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_RealizedInvestmentGainsLossesAbstract" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_AmortizationOfDeferredCharges" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RevenuesAbstract" xlink:to="us-gaap_InterestIncomeOperating" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_StatementLineItems" xlink:to="us-gaap_NetIncomeLoss" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_TrusteeFees" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="ck0001899017_OrganizationCosts" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_OtherGeneralAndAdministrativeExpense" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_InvestmentCompanyContractualFeeWaived" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_InvestmentCompanyVoluntaryFeeWaived" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="ck0001899017_InvestmentCompanyExpenseRecoupmentSupport" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="13" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursementAbstract" xlink:to="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestments">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesByIndustryAxis" xlink:label="us-gaap_EquitySecuritiesByIndustryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="us-gaap_EquitySecuritiesIndustryMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="us-gaap_EquitySecuritiesIndustryMember_default"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AerospaceAndDefenseSectorMember" xlink:label="ck0001899017_AerospaceAndDefenseSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember" xlink:label="ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationExtensibleEnumeration" xlink:label="us-gaap_InvestmentIssuerAffiliationExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:label="us-gaap_InvestmentUnaffiliatedIssuerMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationAxis" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIdentifierAxis" xlink:label="us-gaap_InvestmentIdentifierAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAxis" xlink:label="us-gaap_CashAndCashEquivalentsAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AutomotiveSectorMember" xlink:label="us-gaap_AutomotiveSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember" xlink:label="ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerNameExtensibleEnumeration" xlink:label="us-gaap_InvestmentIssuerNameExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerControlledMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BankingFinanceInsuranceAndRealEstateMember" xlink:label="ck0001899017_BankingFinanceInsuranceAndRealEstateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeExtensibleEnumeration" xlink:label="us-gaap_InvestmentTypeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BeverageFoodandTobaccoSectorMember" xlink:label="ck0001899017_BeverageFoodandTobaccoSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIndustrySectorExtensibleEnumeration" xlink:label="us-gaap_InvestmentIndustrySectorExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CapitalEquipmentSectorMember" xlink:label="ck0001899017_CapitalEquipmentSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" xlink:label="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentVehiclesMember" xlink:label="ck0001899017_InvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentBasisSpreadVariableRate" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChemicalsPlasticsAndRubberMember" xlink:label="ck0001899017_ChemicalsPlasticsAndRubberMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedDebtBasisSpreadVariableRate" xlink:label="ck0001899017_SubordinatedDebtBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConstructionAndBuildingSectorMember" xlink:label="ck0001899017_ConstructionAndBuildingSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate" xlink:label="ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerGoodsDurableSectorMember" xlink:label="ck0001899017_ConsumerGoodsDurableSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind" xlink:label="ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerGoodsNonDurableSectorMember" xlink:label="ck0001899017_ConsumerGoodsNonDurableSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedDebtSpreadVariableRate" xlink:label="ck0001899017_SubordinatedDebtSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ContainersPackagingAndGlassMember" xlink:label="ck0001899017_ContainersPackagingAndGlassMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRatePaidInKind" xlink:label="us-gaap_InvestmentInterestRatePaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EnvironmentalIndustriesSectorMember" xlink:label="ck0001899017_EnvironmentalIndustriesSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRate" xlink:label="us-gaap_InvestmentInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HealthcareAndPharmaceuticalsMember" xlink:label="ck0001899017_HealthcareAndPharmaceuticalsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate" xlink:label="ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HighTechIndustriesMember" xlink:label="ck0001899017_HighTechIndustriesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreferredEquityInterestRate" xlink:label="ck0001899017_PreferredEquityInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HotelGamingAndLeisureMember" xlink:label="ck0001899017_HotelGamingAndLeisureMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CashEquivalentsInterestRate" xlink:label="ck0001899017_CashEquivalentsInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MediaDiversifiedAndProductionMember" xlink:label="ck0001899017_MediaDiversifiedAndProductionMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentMaturityDate" xlink:label="us-gaap_InvestmentMaturityDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MediaAdvertisingPrintingAndPublishingMember" xlink:label="ck0001899017_MediaAdvertisingPrintingAndPublishingMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MetalsAndMiningMember" xlink:label="ck0001899017_MetalsAndMiningMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalanceShares" xlink:label="us-gaap_InvestmentOwnedBalanceShares"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetailMember" xlink:label="us-gaap_RetailMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesBusinessMember" xlink:label="ck0001899017_ServicesBusinessMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashEquivalentsAtCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesConsumerMember" xlink:label="ck0001899017_ServicesConsumerMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue" xlink:label="ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TelecommunicationsMember" xlink:label="ck0001899017_TelecommunicationsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TransportationCargoMember" xlink:label="ck0001899017_TransportationCargoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CashEquivalentsAtFairValue" xlink:label="ck0001899017_CashEquivalentsAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UtilitiesElectricMember" xlink:label="ck0001899017_UtilitiesElectricMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure" xlink:label="ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UtilitiesWaterMember" xlink:label="ck0001899017_UtilitiesWaterMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:label="us-gaap_InvestmentOwnedPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WholesaleMember" xlink:label="ck0001899017_WholesaleMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CashEquivalentsPercentOfNetAssets" xlink:label="ck0001899017_CashEquivalentsPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireFinanceMember" xlink:label="ck0001899017_FireFinanceMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets" xlink:label="ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireInsuranceMember" xlink:label="ck0001899017_FireInsuranceMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentRestrictionStatus" xlink:label="us-gaap_InvestmentRestrictionStatus"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForestProductsAndPaperSectorMember" xlink:label="ck0001899017_ForestProductsAndPaperSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentSignificantUnobservableInput" xlink:label="us-gaap_InvestmentSignificantUnobservableInput"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashEquivalentsMember" xlink:label="us-gaap_CashEquivalentsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentNonIncomeProducing" xlink:label="us-gaap_InvestmentNonIncomeProducing"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_EquitySecuritiesByIndustryAxis" xlink:to="us-gaap_EquitySecuritiesIndustryMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_EquitySecuritiesByIndustryAxis" xlink:to="us-gaap_EquitySecuritiesIndustryMember_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_AerospaceAndDefenseSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:to="ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentIssuerAffiliationExtensibleEnumeration" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentUnaffiliatedIssuerMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="us-gaap_InvestmentIssuerAffiliationDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentIdentifierAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CashAndCashEquivalentsAxis" xlink:to="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_CashAndCashEquivalentsAxis" xlink:to="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_AutomotiveSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:to="ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentIssuerNameExtensibleEnumeration" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerControlledMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_EquitySecuritiesByIndustryAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_BankingFinanceInsuranceAndRealEstateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentTypeExtensibleEnumeration" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_CashAndCashEquivalentsAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_BeverageFoodandTobaccoSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentIndustrySectorExtensibleEnumeration" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentIssuerAffiliationAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_CapitalEquipmentSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_InvestmentVehiclesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentBasisSpreadVariableRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ChemicalsPlasticsAndRubberMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_SubordinatedDebtBasisSpreadVariableRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConstructionAndBuildingSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConsumerGoodsDurableSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConsumerGoodsNonDurableSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_SubordinatedDebtSpreadVariableRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ContainersPackagingAndGlassMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentInterestRatePaidInKind" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_EnvironmentalIndustriesSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentInterestRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HealthcareAndPharmaceuticalsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="13" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HighTechIndustriesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="13" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_PreferredEquityInterestRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="14" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HotelGamingAndLeisureMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="14" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_CashEquivalentsInterestRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="15" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_MediaDiversifiedAndProductionMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="15" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentMaturityDate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="16" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_MediaAdvertisingPrintingAndPublishingMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="16" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedBalancePrincipalAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="17" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_MetalsAndMiningMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="17" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedBalanceShares" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="18" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_RetailMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="18" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="19" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesBusinessMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="19" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_CashEquivalentsAtCarryingValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="20" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesConsumerMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="20" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="21" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_TelecommunicationsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="21" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="22" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_TransportationCargoMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="22" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_CashEquivalentsAtFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="23" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_UtilitiesElectricMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="23" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="24" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_UtilitiesWaterMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="24" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedPercentOfNetAssets" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="25" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_WholesaleMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="25" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_CashEquivalentsPercentOfNetAssets" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="26" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_FireFinanceMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="26" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="27" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_FireInsuranceMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="27" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentRestrictionStatus" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="28" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ForestProductsAndPaperSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="28" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentSignificantUnobservableInput" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="29" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_CashEquivalentsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="29" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentNonIncomeProducing" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsDefault">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="us-gaap_EquitySecuritiesIndustryMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AerospaceAndDefenseSectorMember" xlink:label="ck0001899017_AerospaceAndDefenseSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:label="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember" xlink:label="ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesByIndustryAxis" xlink:label="us-gaap_EquitySecuritiesByIndustryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentUnaffiliatedIssuerMember" xlink:label="us-gaap_InvestmentUnaffiliatedIssuerMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAxis" xlink:label="us-gaap_CashAndCashEquivalentsAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationExtensibleEnumeration" xlink:label="us-gaap_InvestmentIssuerAffiliationExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationAxis" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AutomotiveSectorMember" xlink:label="us-gaap_AutomotiveSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerNameExtensibleEnumeration" xlink:label="us-gaap_InvestmentIssuerNameExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerControlledMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember" xlink:label="ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeExtensibleEnumeration" xlink:label="us-gaap_InvestmentTypeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BankingFinanceInsuranceAndRealEstateMember" xlink:label="ck0001899017_BankingFinanceInsuranceAndRealEstateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIndustrySectorExtensibleEnumeration" xlink:label="us-gaap_InvestmentIndustrySectorExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BeverageFoodandTobaccoSectorMember" xlink:label="ck0001899017_BeverageFoodandTobaccoSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" xlink:label="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CapitalEquipmentSectorMember" xlink:label="ck0001899017_CapitalEquipmentSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentVehiclesMember" xlink:label="ck0001899017_InvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentBasisSpreadVariableRate" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChemicalsPlasticsAndRubberMember" xlink:label="ck0001899017_ChemicalsPlasticsAndRubberMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedDebtBasisSpreadVariableRate" xlink:label="ck0001899017_SubordinatedDebtBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate" xlink:label="ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConstructionAndBuildingSectorMember" xlink:label="ck0001899017_ConstructionAndBuildingSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind" xlink:label="ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerGoodsDurableSectorMember" xlink:label="ck0001899017_ConsumerGoodsDurableSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerGoodsNonDurableSectorMember" xlink:label="ck0001899017_ConsumerGoodsNonDurableSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedDebtSpreadVariableRate" xlink:label="ck0001899017_SubordinatedDebtSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ContainersPackagingAndGlassMember" xlink:label="ck0001899017_ContainersPackagingAndGlassMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRatePaidInKind" xlink:label="us-gaap_InvestmentInterestRatePaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRate" xlink:label="us-gaap_InvestmentInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EnvironmentalIndustriesSectorMember" xlink:label="ck0001899017_EnvironmentalIndustriesSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate" xlink:label="ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HealthcareAndPharmaceuticalsMember" xlink:label="ck0001899017_HealthcareAndPharmaceuticalsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HighTechIndustriesMember" xlink:label="ck0001899017_HighTechIndustriesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreferredEquityInterestRate" xlink:label="ck0001899017_PreferredEquityInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CashEquivalentsInterestRate" xlink:label="ck0001899017_CashEquivalentsInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HotelGamingAndLeisureMember" xlink:label="ck0001899017_HotelGamingAndLeisureMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentMaturityDate" xlink:label="us-gaap_InvestmentMaturityDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MediaDiversifiedAndProductionMember" xlink:label="ck0001899017_MediaDiversifiedAndProductionMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MediaAdvertisingPrintingAndPublishingMember" xlink:label="ck0001899017_MediaAdvertisingPrintingAndPublishingMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MetalsAndMiningMember" xlink:label="ck0001899017_MetalsAndMiningMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalanceShares" xlink:label="us-gaap_InvestmentOwnedBalanceShares"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetailMember" xlink:label="us-gaap_RetailMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashEquivalentsAtCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesBusinessMember" xlink:label="ck0001899017_ServicesBusinessMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesConsumerMember" xlink:label="ck0001899017_ServicesConsumerMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue" xlink:label="ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TelecommunicationsMember" xlink:label="ck0001899017_TelecommunicationsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TransportationCargoMember" xlink:label="ck0001899017_TransportationCargoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CashEquivalentsAtFairValue" xlink:label="ck0001899017_CashEquivalentsAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure" xlink:label="ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UtilitiesElectricMember" xlink:label="ck0001899017_UtilitiesElectricMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:label="us-gaap_InvestmentOwnedPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UtilitiesWaterMember" xlink:label="ck0001899017_UtilitiesWaterMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CashEquivalentsPercentOfNetAssets" xlink:label="ck0001899017_CashEquivalentsPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WholesaleMember" xlink:label="ck0001899017_WholesaleMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets" xlink:label="ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireFinanceMember" xlink:label="ck0001899017_FireFinanceMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireInsuranceMember" xlink:label="ck0001899017_FireInsuranceMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentRestrictionStatus" xlink:label="us-gaap_InvestmentRestrictionStatus"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentSignificantUnobservableInput" xlink:label="us-gaap_InvestmentSignificantUnobservableInput"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForestProductsAndPaperSectorMember" xlink:label="ck0001899017_ForestProductsAndPaperSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashEquivalentsMember" xlink:label="us-gaap_CashEquivalentsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentNonIncomeProducing" xlink:label="us-gaap_InvestmentNonIncomeProducing"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_AerospaceAndDefenseSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:to="ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_EquitySecuritiesByIndustryAxis" xlink:to="us-gaap_EquitySecuritiesIndustryMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentUnaffiliatedIssuerMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CashAndCashEquivalentsAxis" xlink:to="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentIssuerAffiliationExtensibleEnumeration" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="us-gaap_InvestmentIssuerAffiliationDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_EquitySecuritiesByIndustryAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_AutomotiveSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentIssuerNameExtensibleEnumeration" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerControlledMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RestrictedCashAndCashEquivalentsCashAndCashEquivalentsMember" xlink:to="ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentTypeExtensibleEnumeration" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_BankingFinanceInsuranceAndRealEstateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_CashAndCashEquivalentsAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentIndustrySectorExtensibleEnumeration" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_BeverageFoodandTobaccoSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentIssuerAffiliationAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_CapitalEquipmentSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_InvestmentVehiclesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentBasisSpreadVariableRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ChemicalsPlasticsAndRubberMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_SubordinatedDebtBasisSpreadVariableRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConstructionAndBuildingSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConsumerGoodsDurableSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConsumerGoodsNonDurableSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_SubordinatedDebtSpreadVariableRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ContainersPackagingAndGlassMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentInterestRatePaidInKind" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentInterestRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_EnvironmentalIndustriesSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HealthcareAndPharmaceuticalsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="13" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HighTechIndustriesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="13" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_PreferredEquityInterestRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="14" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_CashEquivalentsInterestRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="14" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HotelGamingAndLeisureMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="15" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentMaturityDate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="15" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_MediaDiversifiedAndProductionMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="16" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedBalancePrincipalAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="16" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_MediaAdvertisingPrintingAndPublishingMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="17" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_MetalsAndMiningMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="17" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedBalanceShares" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="18" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="18" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_RetailMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="19" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_CashEquivalentsAtCarryingValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="19" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesBusinessMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="20" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesConsumerMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="20" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="21" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="21" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_TelecommunicationsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="22" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_TransportationCargoMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="22" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_CashEquivalentsAtFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="23" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="23" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_UtilitiesElectricMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="24" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedPercentOfNetAssets" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="24" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_UtilitiesWaterMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="25" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_CashEquivalentsPercentOfNetAssets" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="25" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_WholesaleMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="26" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="26" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_FireFinanceMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="27" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_FireInsuranceMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="27" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentRestrictionStatus" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="28" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentSignificantUnobservableInput" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="28" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ForestProductsAndPaperSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="29" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_CashEquivalentsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="29" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentNonIncomeProducing" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsInterestRateSwap">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeVariableInterestRate" xlink:label="us-gaap_DerivativeVariableInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OpenSwapContractIdentifierAxis" xlink:label="us-gaap_OpenSwapContractIdentifierAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember" xlink:label="us-gaap_InterestRateSwapMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeMaturityDates" xlink:label="us-gaap_DerivativeMaturityDates"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetNotionalAmount" xlink:label="us-gaap_DerivativeAssetNotionalAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeVariableInterestRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_OpenSwapContractIdentifierAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_InterestRateSwapMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeMaturityDates" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeAssetNotionalAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsInterestRateSwapDefault">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember" xlink:label="us-gaap_InterestRateSwapMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeVariableInterestRate" xlink:label="us-gaap_DerivativeVariableInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeMaturityDates" xlink:label="us-gaap_DerivativeMaturityDates"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetNotionalAmount" xlink:label="us-gaap_DerivativeAssetNotionalAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_InterestRateSwapMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeVariableInterestRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeMaturityDates" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeAssetNotionalAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsForwardForeignCurrencyExchangeContracts">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityNotionalAmount" xlink:label="us-gaap_DerivativeLiabilityNotionalAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" xlink:label="us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetNotionalAmount" xlink:label="us-gaap_DerivativeAssetNotionalAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetCounterpartyNameExtensibleList" xlink:label="us-gaap_DerivativeAssetCounterpartyNameExtensibleList"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeMaturityDates" xlink:label="us-gaap_DerivativeMaturityDates"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetFairValueGrossLiability" xlink:label="us-gaap_DerivativeAssetFairValueGrossLiability"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement" xlink:label="us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilities" xlink:label="us-gaap_DerivativeLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssets" xlink:label="us-gaap_DerivativeAssets"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeLiabilityNotionalAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_OpenForwardForeignCurrencyContractIdentifierAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeAssetNotionalAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeAssetCounterpartyNameExtensibleList" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeMaturityDates" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeAssetFairValueGrossLiability" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeAssetFairValueGrossAssetIncludingNotSubjectToMasterNettingArrangement" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeLiabilities" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DerivativeAssets" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedScheduleOfInvestmentsForwardForeignCurrencyExchangeContractsParenthetical">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNet" xlink:label="us-gaap_AssetsNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AdvancedAircrewMember" xlink:label="ck0001899017_AdvancedAircrewMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationAxis" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorOneMember" xlink:label="ck0001899017_InterestRateFloorOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NonQualifyingAssetsPercentageOfTotalAsset" xlink:label="ck0001899017_NonQualifyingAssetsPercentageOfTotalAsset"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AGSAmericanServicesInvestmentsLPMember" xlink:label="ck0001899017_AGSAmericanServicesInvestmentsLPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorTwoMember" xlink:label="ck0001899017_InterestRateFloorTwoMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAcquisitionDate" xlink:label="us-gaap_InvestmentAcquisitionDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorThreeMember" xlink:label="ck0001899017_InterestRateFloorThreeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesFvNiRestricted" xlink:label="us-gaap_EquitySecuritiesFvNiRestricted"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BCCCPKInvestments2LPMember" xlink:label="ck0001899017_BCCCPKInvestments2LPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorFourMember" xlink:label="ck0001899017_InterestRateFloorFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedInvestmentsPercentOfNetAssets" xlink:label="us-gaap_RestrictedInvestmentsPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BCCHGSInvestments2LPMember" xlink:label="ck0001899017_BCCHGSInvestments2LPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorFiveMember" xlink:label="ck0001899017_InterestRateFloorFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRateFloor" xlink:label="us-gaap_InvestmentInterestRateFloor"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BCCTrilliumFoodsInvestments2LPMember" xlink:label="ck0001899017_BCCTrilliumFoodsInvestments2LPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorSixMember" xlink:label="ck0001899017_InterestRateFloorSixMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BcpcProjectAberdeenLlcMember" xlink:label="ck0001899017_BcpcProjectAberdeenLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorSevenMember" xlink:label="ck0001899017_InterestRateFloorSevenMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashEquivalents" xlink:label="us-gaap_RestrictedCashEquivalents"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BtxPrecisionMember" xlink:label="ck0001899017_BtxPrecisionMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorEightMember" xlink:label="ck0001899017_InterestRateFloorEightMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChartbeatMember" xlink:label="ck0001899017_ChartbeatMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorNineMember" xlink:label="ck0001899017_InterestRateFloorNineMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentBasisSpreadVariableRate" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CityBbqMember" xlink:label="ck0001899017_CityBbqMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SONIAPlusSixPointFourTwoPercentageMember" xlink:label="ck0001899017_SONIAPlusSixPointFourTwoPercentageMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DtiqMember" xlink:label="ck0001899017_DtiqMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EURIBORPlusSixPointTwoFivePercentageMember" xlink:label="ck0001899017_EURIBORPlusSixPointTwoFivePercentageMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EheHealthMember" xlink:label="ck0001899017_EheHealthMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SONIAPlusSixPointThreeEightPercentageMember" xlink:label="ck0001899017_SONIAPlusSixPointThreeEightPercentageMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ElectronicMerchantSystemsMember" xlink:label="ck0001899017_ElectronicMerchantSystemsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ElevationNewCoIntermediateLLCMember" xlink:label="ck0001899017_ElevationNewCoIntermediateLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EnduranceHoldcoLimitedMember" xlink:label="ck0001899017_EnduranceHoldcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GaleriaMember" xlink:label="ck0001899017_GaleriaMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HGInsightsIncMember" xlink:label="ck0001899017_HGInsightsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HollywoodLPMember" xlink:label="ck0001899017_HollywoodLPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LegacyCorporateLendingHoldcoLlcMember" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LEPCPCo-InvestLPMember" xlink:label="ck0001899017_LEPCPCo-InvestLPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LEPSALCoInvestLPMember" xlink:label="ck0001899017_LEPSALCoInvestLPMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OdysseyBehavioralHealthMember" xlink:label="ck0001899017_OdysseyBehavioralHealthMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PayRangeMember" xlink:label="ck0001899017_PayRangeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PPTGroupMember" xlink:label="ck0001899017_PPTGroupMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PureWaferMember" xlink:label="ck0001899017_PureWaferMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RydooMember" xlink:label="ck0001899017_RydooMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SensortowerMember" xlink:label="ck0001899017_SensortowerMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SikichMember" xlink:label="ck0001899017_SikichMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SoftcoMember" xlink:label="ck0001899017_SoftcoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SpindriftMember" xlink:label="ck0001899017_SpindriftMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_AssetsNet" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_AdvancedAircrewMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="us-gaap_InvestmentIssuerAffiliationDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentIssuerAffiliationAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorOneMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_NonQualifyingAssetsPercentageOfTotalAsset" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_AGSAmericanServicesInvestmentsLPMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorTwoMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentAcquisitionDate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorThreeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_EquitySecuritiesFvNiRestricted" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_BCCCPKInvestments2LPMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_RestrictedInvestmentsPercentOfNetAssets" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_BCCHGSInvestments2LPMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentInterestRateFloor" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_BCCTrilliumFoodsInvestments2LPMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorSixMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_BcpcProjectAberdeenLlcMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorSevenMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_RestrictedCashEquivalents" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_BtxPrecisionMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorEightMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedBalancePrincipalAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_ChartbeatMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_InterestRateFloorNineMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentBasisSpreadVariableRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_CityBbqMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_SONIAPlusSixPointFourTwoPercentageMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_DtiqMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_EURIBORPlusSixPointTwoFivePercentageMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_EheHealthMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="ck0001899017_SONIAPlusSixPointThreeEightPercentageMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_ElectronicMerchantSystemsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="13" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_ElevationNewCoIntermediateLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="14" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_EnduranceHoldcoLimitedMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="15" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_GaleriaMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="16" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_HGInsightsIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="17" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_HollywoodLPMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="18" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_LegacyCorporateLendingHoldcoLlcMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="19" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_LEPCPCo-InvestLPMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="20" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_LEPSALCoInvestLPMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="21" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_OdysseyBehavioralHealthMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="22" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_PayRangeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="23" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_PPTGroupMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="24" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_PureWaferMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="25" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_RydooMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="26" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_SensortowerMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="27" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_SikichMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="28" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_SoftcoMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="29" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_SpindriftMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/cef/role/SecurityOnly">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FacilitiesMember" xlink:label="ck0001899017_FacilitiesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheAMember" xlink:label="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheAMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheBMember" xlink:label="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheBMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TotalSeniorSecuritiesMember" xlink:label="ck0001899017_TotalSeniorSecuritiesMember"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_FacilitiesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheAMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheBMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TotalSeniorSecuritiesMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://xbrl.sec.gov/cef/role/RiskOnly">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cef/2025/cef-2025.xsd#cef_AllRisksMember" xlink:label="cef_AllRisksMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RisksRelatingToOurBusinessAndStructureMember" xlink:label="ck0001899017_RisksRelatingToOurBusinessAndStructureMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RisksRelatingToTheNinteenFourtyActMember" xlink:label="ck0001899017_RisksRelatingToTheNinteenFourtyActMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RisksRelatingToInvestmentsMember" xlink:label="ck0001899017_RisksRelatingToInvestmentsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FederalIncomeTaxAndOtherTaxRisksMember" xlink:label="ck0001899017_FederalIncomeTaxAndOtherTaxRisksMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RisksRelatingToCommonSharesMember" xlink:label="ck0001899017_RisksRelatingToCommonSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GeneralRiskFactorsMember" xlink:label="ck0001899017_GeneralRiskFactorsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RisksRelatingToInfectiousDiseasesAndPandemicsMember" xlink:label="ck0001899017_RisksRelatingToInfectiousDiseasesAndPandemicsMember"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cef_AllRisksMember" xlink:to="ck0001899017_RisksRelatingToOurBusinessAndStructureMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cef_AllRisksMember" xlink:to="ck0001899017_RisksRelatingToTheNinteenFourtyActMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cef_AllRisksMember" xlink:to="ck0001899017_RisksRelatingToInvestmentsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cef_AllRisksMember" xlink:to="ck0001899017_FederalIncomeTaxAndOtherTaxRisksMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cef_AllRisksMember" xlink:to="ck0001899017_RisksRelatingToCommonSharesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cef_AllRisksMember" xlink:to="ck0001899017_GeneralRiskFactorsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cef_AllRisksMember" xlink:to="ck0001899017_RisksRelatingToInfectiousDiseasesAndPandemicsMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCybersecurityRiskManagementStrategyAndGovernance">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementStrategyAndGovernanceTable" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:label="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock" xlink:label="cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems" xlink:label="cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:label="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementProcessesIntegratedFlag" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock" xlink:label="cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock" xlink:label="cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskRoleOfManagementTextBlock" xlink:label="cyd_CybersecurityRiskRoleOfManagementTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementThirdPartyEngagedFlag" xlink:label="cyd_CybersecurityRiskManagementThirdPartyEngagedFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag" xlink:label="cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock" xlink:label="cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock" xlink:label="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock" xlink:label="cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/cyd/2025/cyd-2025.xsd#cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag" xlink:label="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract" xlink:to="cyd_CybersecurityRiskManagementStrategyAndGovernanceTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems" xlink:to="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:to="cyd_CybersecurityRiskManagementProcessesIntegratedFlag" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskManagementStrategyAndGovernanceAbstract" xlink:to="cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskProcessForInformingBoardCommitteeOrSubcommitteeResponsibleForOversightTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskManagementStrategyAndGovernanceLineItems" xlink:to="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:to="cyd_CybersecurityRiskManagementProcessesIntegratedTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskRoleOfManagementTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:to="cyd_CybersecurityRiskManagementThirdPartyEngagedFlag" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleFlag" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:to="cyd_CybersecurityRiskThirdPartyOversightAndIdentificationProcessesFlag" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:to="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantFlag" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskManagementExpertiseOfManagementResponsibleTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskManagementProcessesForAssessingIdentifyingAndManagingThreatsTextBlock" xlink:to="cyd_CybersecurityRiskMateriallyAffectedOrReasonablyLikelyToMateriallyAffectRegistrantTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskProcessForInformingManagementOrCommitteesResponsibleTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="cyd_CybersecurityRiskBoardOfDirectorsOversightTextBlock" xlink:to="cyd_CybersecurityRiskManagementPositionsOrCommitteesResponsibleReportToBoardFlag" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsTables"/>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtTables">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ScheduleOfCarryingValuesOfDebtTableTextBlock" xlink:label="ck0001899017_ScheduleOfCarryingValuesOfDebtTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheAMember" xlink:label="ck0001899017_TrancheAMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" xlink:label="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDebtTableTextBlock" xlink:label="us-gaap_ScheduleOfDebtTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBMember" xlink:label="ck0001899017_TrancheBMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JpmRevolvingCreditFacilityMember" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock" xlink:label="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" xlink:label="us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_Series2025SeniorNotesMember" xlink:label="ck0001899017_Series2025SeniorNotesMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_ScheduleOfCarryingValuesOfDebtTableTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheAMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_ScheduleOfDebtTableTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheBMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_JpmRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_ScheduleOfMaturitiesOfLongTermDebtTableTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_SmbcRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestIncomeAndInterestExpenseDisclosureTableTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_Series2025SeniorNotesMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesTables">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems" xlink:label="us-gaap_DerivativeLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable" xlink:label="us-gaap_DerivativeTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember" xlink:label="us-gaap_InterestRateSwapMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" xlink:label="us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_DerivativeTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_ScheduleOfDerivativeInstrumentsInStatementOfFinancialPositionFairValueTextBlock" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_InterestRateSwapMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_ScheduleOfDerivativeInstrumentsGainLossInStatementOfFinancialPerformanceTextBlock" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureOrganizationDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockParOrStatedValuePerShare" xlink:label="us-gaap_CommonStockParOrStatedValuePerShare"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassSSharesMember" xlink:label="ck0001899017_ClassSSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" xlink:label="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassDSharesMember" xlink:label="ck0001899017_ClassDSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EarningsBeforeInterestTaxDepreciationAndAmortizationOfMiddleMarketCompanies" xlink:label="ck0001899017_EarningsBeforeInterestTaxDepreciationAndAmortizationOfMiddleMarketCompanies"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfOperatingSegments" xlink:label="us-gaap_NumberOfOperatingSegments"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NumberOfReportableSegments" xlink:label="us-gaap_NumberOfReportableSegments"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration" xlink:label="us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage" xlink:label="ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MinimumMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="srt_RangeAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_CommonStockParOrStatedValuePerShare" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassSSharesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MaximumMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_StatementClassOfStockAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassDSharesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_EarningsBeforeInterestTaxDepreciationAndAmortizationOfMiddleMarketCompanies" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_NumberOfOperatingSegments" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_NumberOfReportableSegments" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_SegmentReportingCodmIndividualTitleAndPositionOrGroupOrCommitteeNameExtensibleEnumeration" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsInvestmentByTypeDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis" xlink:label="us-gaap_InvestmentTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FirstLienSeniorSecuredLoansMember" xlink:label="ck0001899017_FirstLienSeniorSecuredLoansMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentPercentOfPortfolioAmortizedCost" xlink:label="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SecondLienSeniorSecuredLoanMember" xlink:label="ck0001899017_SecondLienSeniorSecuredLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentPercentOfPortfolioFairValue" xlink:label="ck0001899017_InvestmentPercentOfPortfolioFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesMember" xlink:label="us-gaap_EquitySecuritiesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubordinatedDebtMember" xlink:label="us-gaap_SubordinatedDebtMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNotesInInvestmentVehiclesMember" xlink:label="ck0001899017_SubordinatedNotesInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember" xlink:label="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EquityInterestsInInvestmentVehiclesMember" xlink:label="ck0001899017_EquityInterestsInInvestmentVehiclesMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeCategorizationMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeCategorizationMember_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_FirstLienSeniorSecuredLoansMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentTypeAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_SecondLienSeniorSecuredLoanMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_PreferredStockMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentPercentOfPortfolioFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_EquitySecuritiesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_SubordinatedDebtMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_WarrantMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_SubordinatedNotesInInvestmentVehiclesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_EquityInterestsInInvestmentVehiclesMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:label="us-gaap_ScheduleOfEquityMethodInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="srt_EquityMethodInvesteeNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="srt_EquityMethodInvesteeNameDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis" xlink:label="us-gaap_InvestmentTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmberstoneCo.Ltd.Member" xlink:label="ck0001899017_AmberstoneCo.Ltd.Member"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain" xlink:label="us-gaap_VariableRateDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MMCLOWH1CreditFacilityMember" xlink:label="ck0001899017_MMCLOWH1CreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateAxis" xlink:label="us-gaap_VariableRateAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain" xlink:label="us-gaap_VariableRateDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubordinatedDebtMember" xlink:label="us-gaap_SubordinatedDebtMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramLlcMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentOwnershipPercentage" xlink:label="us-gaap_EquityMethodInvestmentOwnershipPercentage"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyCommittedCapital" xlink:label="us-gaap_InvestmentCompanyCommittedCapital"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesMember" xlink:label="us-gaap_EquitySecuritiesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Investments" xlink:label="us-gaap_Investments"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockMember" xlink:label="us-gaap_CommonStockMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquityMethodInvestmentSoldCarryingAmount" xlink:label="us-gaap_EquityMethodInvestmentSoldCarryingAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateEffectivePercentage" xlink:label="us-gaap_DebtInstrumentInterestRateEffectivePercentage"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityExpirationDate1" xlink:label="us-gaap_LineOfCreditFacilityExpirationDate1"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit" xlink:label="us-gaap_LineOfCredit"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_ScheduleOfEquityMethodInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="srt_EquityMethodInvesteeNameDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="srt_EquityMethodInvesteeNameDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeCategorizationMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AmberstoneCo.Ltd.Member" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_VariableRateDomain" xlink:to="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:to="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_MMCLOWH1CreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_VariableRateAxis" xlink:to="us-gaap_VariableRateDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_VariableRateAxis" xlink:to="us-gaap_VariableRateDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_SubordinatedDebtMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramLlcMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_EquityMethodInvestmentOwnershipPercentage" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_PreferredStockMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_InvestmentCompanyCommittedCapital" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:to="us-gaap_InvestmentTypeAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_EquitySecuritiesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_Investments" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:to="us-gaap_CreditFacilityAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_CommonStockMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsTable" xlink:to="us-gaap_VariableRateAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_EquityMethodInvestmentSoldCarryingAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_DebtInstrumentInterestRateEffectivePercentage" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_LineOfCreditFacilityExpirationDate1" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfEquityMethodInvestmentsLineItems" xlink:to="us-gaap_LineOfCredit" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsInvestmentByGeographicRegionDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_US" xlink:label="country_US"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementGeographicalAxis" xlink:label="srt_StatementGeographicalAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_SegmentGeographicalDomain" xlink:label="srt_SegmentGeographicalDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_GB" xlink:label="country_GB"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentPercentOfPortfolioAmortizedCost" xlink:label="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_CA" xlink:label="country_CA"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_DE" xlink:label="country_DE"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentPercentOfPortfolioFairValue" xlink:label="ck0001899017_InvestmentPercentOfPortfolioFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_LU" xlink:label="country_LU"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_FR" xlink:label="country_FR"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_IT" xlink:label="country_IT"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_JE" xlink:label="country_JE"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_IE" xlink:label="country_IE"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_AU" xlink:label="country_AU"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_NL" xlink:label="country_NL"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_BE" xlink:label="country_BE"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_GG" xlink:label="country_GG"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_NZ" xlink:label="country_NZ"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.sec.gov/country/2025/country-2025.xsd#country_IL" xlink:label="country_IL"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_US" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_StatementGeographicalAxis" xlink:to="srt_SegmentGeographicalDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="srt_StatementGeographicalAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_GB" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_CA" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_DE" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentPercentOfPortfolioFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_LU" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_FR" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_IT" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_JE" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_IE" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_AU" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_NL" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_BE" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_GG" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="13" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_NZ" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="14" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_SegmentGeographicalDomain" xlink:to="country_IL" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsInvestmentByIndustryDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsLineItems" xlink:label="us-gaap_ScheduleOfInvestmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesByIndustryAxis" xlink:label="us-gaap_EquitySecuritiesByIndustryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="us-gaap_EquitySecuritiesIndustryMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HealthcareAndPharmaceuticalsMember" xlink:label="ck0001899017_HealthcareAndPharmaceuticalsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesBusinessMember" xlink:label="ck0001899017_ServicesBusinessMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentPercentOfPortfolioAmortizedCost" xlink:label="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HighTechIndustriesMember" xlink:label="ck0001899017_HighTechIndustriesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesConsumerMember" xlink:label="ck0001899017_ServicesConsumerMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentPercentOfPortfolioFairValue" xlink:label="ck0001899017_InvestmentPercentOfPortfolioFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AerospaceSectorMember" xlink:label="us-gaap_AerospaceSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BeverageFoodAndTobaccoMember" xlink:label="ck0001899017_BeverageFoodAndTobaccoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HotelGamingAndLeisureMember" xlink:label="ck0001899017_HotelGamingAndLeisureMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerGoodsNonDurableSectorMember" xlink:label="ck0001899017_ConsumerGoodsNonDurableSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireFinanceSectorMember" xlink:label="ck0001899017_FireFinanceSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConstructionSectorMember" xlink:label="us-gaap_ConstructionSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WholesaleMember" xlink:label="ck0001899017_WholesaleMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChemicalsPlasticsAndRubberMember" xlink:label="ck0001899017_ChemicalsPlasticsAndRubberMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UtilitiesElectricMember" xlink:label="ck0001899017_UtilitiesElectricMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CapitalEquipmentSectorMember" xlink:label="ck0001899017_CapitalEquipmentSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireInsuranceMember" xlink:label="ck0001899017_FireInsuranceMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TransportationCargoSectorMember" xlink:label="ck0001899017_TransportationCargoSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ContainersPackagingAndGlassMember" xlink:label="ck0001899017_ContainersPackagingAndGlassMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AutomotiveSectorMember" xlink:label="us-gaap_AutomotiveSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentOnVehiclesMember" xlink:label="ck0001899017_InvestmentOnVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerSectorDurableMember" xlink:label="ck0001899017_ConsumerSectorDurableMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MediaAdvertisingPrintingAndPublishingMember" xlink:label="ck0001899017_MediaAdvertisingPrintingAndPublishingMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TelecommunicationsMember" xlink:label="ck0001899017_TelecommunicationsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EnvironmentalIndustriesSectorMember" xlink:label="ck0001899017_EnvironmentalIndustriesSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UtilitiesWaterMember" xlink:label="ck0001899017_UtilitiesWaterMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MetalsAndMiningMember" xlink:label="ck0001899017_MetalsAndMiningMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetailSectorMember" xlink:label="us-gaap_RetailSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BankingFinanceInsuranceAndRealEstateMember" xlink:label="ck0001899017_BankingFinanceInsuranceAndRealEstateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MediaDiversifiedAndProductionMember" xlink:label="ck0001899017_MediaDiversifiedAndProductionMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForestProductsAndPaperMember" xlink:label="ck0001899017_ForestProductsAndPaperMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_EquitySecuritiesByIndustryAxis" xlink:to="us-gaap_EquitySecuritiesIndustryMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HealthcareAndPharmaceuticalsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_EquitySecuritiesByIndustryAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesBusinessMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HighTechIndustriesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesConsumerMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ScheduleOfInvestmentsLineItems" xlink:to="ck0001899017_InvestmentPercentOfPortfolioFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_AerospaceSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_BeverageFoodAndTobaccoMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HotelGamingAndLeisureMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConsumerGoodsNonDurableSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_FireFinanceSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_ConstructionSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_WholesaleMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ChemicalsPlasticsAndRubberMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_UtilitiesElectricMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="13" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_CapitalEquipmentSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="14" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_FireInsuranceMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="15" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_TransportationCargoSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="16" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ContainersPackagingAndGlassMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="17" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_AutomotiveSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="18" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_InvestmentOnVehiclesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="19" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConsumerSectorDurableMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="20" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_MediaAdvertisingPrintingAndPublishingMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="21" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_TelecommunicationsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="22" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_EnvironmentalIndustriesSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="23" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_UtilitiesWaterMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="24" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_MetalsAndMiningMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="25" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_RetailSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="26" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_BankingFinanceInsuranceAndRealEstateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="27" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_MediaDiversifiedAndProductionMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="28" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ForestProductsAndPaperMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsScheduleOfSlpiisPortfolioAtFairValueDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskLineItems" xlink:label="us-gaap_ConcentrationRiskLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByTypeAxis" xlink:label="us-gaap_ConcentrationRiskByTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="us-gaap_ConcentrationRiskTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskTypeDomain" xlink:label="us-gaap_ConcentrationRiskTypeDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain" xlink:label="srt_NameOfMajorCustomerDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LargestInvesteeMember" xlink:label="ck0001899017_LargestInvesteeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:label="us-gaap_ConcentrationRiskByBenchmarkAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ConcentrationRiskBenchmarkDomain" xlink:label="us-gaap_ConcentrationRiskBenchmarkDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentConcentrationRiskMember" xlink:label="ck0001899017_InvestmentConcentrationRiskMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentsOperationsMember" xlink:label="ck0001899017_InvestmentsOperationsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MajorCustomersAxis" xlink:label="srt_MajorCustomersAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_NameOfMajorCustomerDomain" xlink:label="srt_NameOfMajorCustomerDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentSecuritiesWeightedAverageYield" xlink:label="ck0001899017_InvestmentSecuritiesWeightedAverageYield"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FiveLargestInvesteeMember" xlink:label="ck0001899017_FiveLargestInvesteeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NumberOfBorrowers" xlink:label="ck0001899017_NumberOfBorrowers"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentUnfundedCommitments" xlink:label="ck0001899017_InvestmentUnfundedCommitments"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ConcentrationRiskLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ConcentrationRiskByTypeAxis" xlink:to="us-gaap_ConcentrationRiskTypeDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ConcentrationRiskByTypeAxis" xlink:to="us-gaap_ConcentrationRiskTypeDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ConcentrationRiskLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_NameOfMajorCustomerDomain" xlink:to="ck0001899017_LargestInvesteeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:to="us-gaap_ConcentrationRiskBenchmarkDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ConcentrationRiskByBenchmarkAxis" xlink:to="us-gaap_ConcentrationRiskBenchmarkDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ConcentrationRiskTypeDomain" xlink:to="ck0001899017_InvestmentConcentrationRiskMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ConcentrationRiskBenchmarkDomain" xlink:to="ck0001899017_InvestmentsOperationsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_MajorCustomersAxis" xlink:to="srt_NameOfMajorCustomerDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_MajorCustomersAxis" xlink:to="srt_NameOfMajorCustomerDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ConcentrationRiskLineItems" xlink:to="ck0001899017_InvestmentSecuritiesWeightedAverageYield" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_NameOfMajorCustomerDomain" xlink:to="ck0001899017_FiveLargestInvesteeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_ConcentrationRiskByBenchmarkAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ConcentrationRiskLineItems" xlink:to="ck0001899017_NumberOfBorrowers" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_ConcentrationRiskByTypeAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ConcentrationRiskLineItems" xlink:to="ck0001899017_InvestmentUnfundedCommitments" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="srt_MajorCustomersAxis" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIisScheduleOfInvestmentsDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:label="us-gaap_SummaryOfInvestmentHoldingsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesByIndustryAxis" xlink:label="us-gaap_EquitySecuritiesByIndustryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="us-gaap_EquitySecuritiesIndustryMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" xlink:label="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AerospaceAndDefenseSectorMember" xlink:label="ck0001899017_AerospaceAndDefenseSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentBasisSpreadVariableRate" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AutomotiveSectorMember" xlink:label="us-gaap_AutomotiveSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRatePaidInKind" xlink:label="us-gaap_InvestmentInterestRatePaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CapitalEquipmentSectorMember" xlink:label="ck0001899017_CapitalEquipmentSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIdentifierAxis" xlink:label="us-gaap_InvestmentIdentifierAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRate" xlink:label="us-gaap_InvestmentInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConstructionBuildingMember" xlink:label="ck0001899017_ConstructionBuildingMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentMaturityDate" xlink:label="us-gaap_InvestmentMaturityDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerGoodsNonDurableSectorMember" xlink:label="ck0001899017_ConsumerGoodsNonDurableSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireFinanceMember" xlink:label="ck0001899017_FireFinanceMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalanceShares" xlink:label="us-gaap_InvestmentOwnedBalanceShares"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HealthcareAndPharmaceuticalsMember" xlink:label="ck0001899017_HealthcareAndPharmaceuticalsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HighTechIndustriesMember" xlink:label="ck0001899017_HighTechIndustriesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HotelGamingAndLeisureMember" xlink:label="ck0001899017_HotelGamingAndLeisureMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:label="us-gaap_InvestmentOwnedPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesBusinessMember" xlink:label="ck0001899017_ServicesBusinessMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesConsumerMember" xlink:label="ck0001899017_ServicesConsumerMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UtilitiesElectricMember" xlink:label="ck0001899017_UtilitiesElectricMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WholesaleMember" xlink:label="ck0001899017_WholesaleMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_EquitySecuritiesByIndustryAxis" xlink:to="us-gaap_EquitySecuritiesIndustryMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_AerospaceAndDefenseSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentBasisSpreadVariableRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_AutomotiveSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_EquitySecuritiesByIndustryAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentInterestRatePaidInKind" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_CapitalEquipmentSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentIdentifierAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentInterestRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConstructionBuildingMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentMaturityDate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConsumerGoodsNonDurableSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedBalancePrincipalAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_FireFinanceMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedBalanceShares" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HealthcareAndPharmaceuticalsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HighTechIndustriesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HotelGamingAndLeisureMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedPercentOfNetAssets" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesBusinessMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesConsumerMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_UtilitiesElectricMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_WholesaleMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIisScheduleOfInvestmentsDetailsDefault">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:label="us-gaap_SummaryOfInvestmentHoldingsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesByIndustryAxis" xlink:label="us-gaap_EquitySecuritiesByIndustryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="us-gaap_EquitySecuritiesIndustryMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AerospaceAndDefenseSectorMember" xlink:label="ck0001899017_AerospaceAndDefenseSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" xlink:label="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AutomotiveSectorMember" xlink:label="us-gaap_AutomotiveSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentBasisSpreadVariableRate" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRatePaidInKind" xlink:label="us-gaap_InvestmentInterestRatePaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CapitalEquipmentSectorMember" xlink:label="ck0001899017_CapitalEquipmentSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConstructionBuildingMember" xlink:label="ck0001899017_ConstructionBuildingMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentInterestRate" xlink:label="us-gaap_InvestmentInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentMaturityDate" xlink:label="us-gaap_InvestmentMaturityDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConsumerGoodsNonDurableSectorMember" xlink:label="ck0001899017_ConsumerGoodsNonDurableSectorMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireFinanceMember" xlink:label="ck0001899017_FireFinanceMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalancePrincipalAmount" xlink:label="us-gaap_InvestmentOwnedBalancePrincipalAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HealthcareAndPharmaceuticalsMember" xlink:label="ck0001899017_HealthcareAndPharmaceuticalsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedBalanceShares" xlink:label="us-gaap_InvestmentOwnedBalanceShares"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HighTechIndustriesMember" xlink:label="ck0001899017_HighTechIndustriesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HotelGamingAndLeisureMember" xlink:label="ck0001899017_HotelGamingAndLeisureMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesBusinessMember" xlink:label="ck0001899017_ServicesBusinessMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedPercentOfNetAssets" xlink:label="us-gaap_InvestmentOwnedPercentOfNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ServicesConsumerMember" xlink:label="ck0001899017_ServicesConsumerMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UtilitiesElectricMember" xlink:label="ck0001899017_UtilitiesElectricMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WholesaleMember" xlink:label="ck0001899017_WholesaleMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_EquitySecuritiesByIndustryAxis" xlink:to="us-gaap_EquitySecuritiesIndustryMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_AerospaceAndDefenseSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_EquitySecuritiesByIndustryAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="us-gaap_AutomotiveSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentBasisSpreadVariableRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentInterestRatePaidInKind" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_CapitalEquipmentSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConstructionBuildingMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentInterestRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentMaturityDate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ConsumerGoodsNonDurableSectorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_FireFinanceMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedBalancePrincipalAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HealthcareAndPharmaceuticalsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedBalanceShares" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HighTechIndustriesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_HotelGamingAndLeisureMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesBusinessMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_InvestmentOwnedPercentOfNetAssets" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_ServicesConsumerMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_UtilitiesElectricMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_WholesaleMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIisScheduleOfInvestmentsParentheticalDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:label="us-gaap_SummaryOfInvestmentHoldingsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNet" xlink:label="us-gaap_AssetsNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorOneMember" xlink:label="ck0001899017_InterestRateFloorOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorTwoMember" xlink:label="ck0001899017_InterestRateFloorTwoMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIdentifierAxis" xlink:label="us-gaap_InvestmentIdentifierAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorThreeMember" xlink:label="ck0001899017_InterestRateFloorThreeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorFourMember" xlink:label="ck0001899017_InterestRateFloorFourMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_AssetsNet" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_InterestRateFloorOneMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_InterestRateFloorTwoMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentIdentifierAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_InterestRateFloorThreeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_DebtInstrumentAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_InterestRateFloorFourMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIisScheduleOfInvestmentsParentheticalDetailsDefault">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:label="us-gaap_SummaryOfInvestmentHoldingsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfInvestmentsTable" xlink:label="us-gaap_ScheduleOfInvestmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorOneMember" xlink:label="ck0001899017_InterestRateFloorOneMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNet" xlink:label="us-gaap_AssetsNet"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorTwoMember" xlink:label="ck0001899017_InterestRateFloorTwoMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorThreeMember" xlink:label="ck0001899017_InterestRateFloorThreeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestRateFloorFourMember" xlink:label="ck0001899017_InterestRateFloorFourMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_ScheduleOfInvestmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_InterestRateFloorOneMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_AssetsNet" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_InterestRateFloorTwoMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SummaryOfInvestmentHoldingsLineItems" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_InterestRateFloorThreeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfInvestmentsTable" xlink:to="us-gaap_DebtInstrumentAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_InterestRateFloorFourMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIiBalanceSheetDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseCurrent" xlink:label="us-gaap_PrepaidExpenseCurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredOfferingCosts" xlink:label="us-gaap_DeferredOfferingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestReceivable" xlink:label="us-gaap_InterestReceivable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesPayable" xlink:label="us-gaap_NotesPayable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers" xlink:label="ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit" xlink:label="us-gaap_LineOfCredit"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:label="us-gaap_DividendsPayableCurrentAndNoncurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtCost" xlink:label="us-gaap_InvestmentOwnedAtCost"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccumulatedAmortizationDeferredFinanceCosts" xlink:label="us-gaap_AccumulatedAmortizationDeferredFinanceCosts"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_PrepaidExpenseCurrent" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_DeferredOfferingCosts" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_InterestReceivable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_Assets" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_NotesPayable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_InterestPayableCurrentAndNoncurrent" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_LineOfCredit" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_DividendsPayableCurrentAndNoncurrent" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_Liabilities" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="13" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_StockholdersEquity" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="14" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="15" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_LiabilitiesAndStockholdersEquity" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="16" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_InvestmentOwnedAtCost" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="17" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_AccumulatedAmortizationDeferredFinanceCosts" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIiStatementOfOperationsDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:label="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:label="us-gaap_RealizedInvestmentGainsLossesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeRealizedGainLossOperatingBeforeTax" xlink:label="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeRealizedGainLossOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetInvestmentIncomeAbstract" xlink:label="us-gaap_NetInvestmentIncomeAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="us-gaap_InvestmentIncomeInterest"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CostsAndExpensesAbstract" xlink:label="us-gaap_CostsAndExpensesAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="us-gaap_UnrealizedGainLossOnInvestments"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossInvestmentIncomeOperating" xlink:label="us-gaap_GrossInvestmentIncomeOperating"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ProfessionalFeesAndOtherExpenses" xlink:label="ck0001899017_ProfessionalFeesAndOtherExpenses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:label="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInvestmentExpense" xlink:label="us-gaap_InvestmentIncomeInvestmentExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeRealizedGainLossOperatingBeforeTax" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_NetInvestmentIncomeAbstract" xlink:to="us-gaap_InvestmentIncomeInterest" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CostsAndExpensesAbstract" xlink:to="us-gaap_InterestExpense" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" xlink:to="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_NetInvestmentIncomeAbstract" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_UnrealizedGainLossOnInvestments" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_NetInvestmentIncomeAbstract" xlink:to="us-gaap_GrossInvestmentIncomeOperating" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CostsAndExpensesAbstract" xlink:to="ck0001899017_ProfessionalFeesAndOtherExpenses" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_CostsAndExpensesAbstract" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RealizedInvestmentGainsLossesAbstract" xlink:to="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CostsAndExpensesAbstract" xlink:to="us-gaap_InvestmentIncomeInvestmentExpense" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_RealizedInvestmentGainsLossesAbstract" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyNonconsolidatedSubsidiaryLineItems" xlink:to="us-gaap_NetIncomeLoss" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsScheduleOfInvestmentsByFairValueHierarchyDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis" xlink:label="us-gaap_InvestmentTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel1Member" xlink:label="us-gaap_FairValueInputsLevel1Member"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember" xlink:label="us-gaap_InterestRateSwapMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FirstLienSeniorSecuredLoansMember" xlink:label="ck0001899017_FirstLienSeniorSecuredLoansMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="us-gaap_ForeignExchangeForwardMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsFairValueDisclosure" xlink:label="us-gaap_CashAndCashEquivalentsFairValueDisclosure"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="us-gaap_FairValueInputsLevel2Member"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SecondLienSeniorSecuredLoanMember" xlink:label="ck0001899017_SecondLienSeniorSecuredLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilities" xlink:label="us-gaap_DerivativeLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubordinatedDebtMember" xlink:label="us-gaap_SubordinatedDebtMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" xlink:label="us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesMember" xlink:label="us-gaap_EquitySecuritiesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNoteInInvestmentVehiclesMember" xlink:label="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember" xlink:label="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EquityInterestInInvestmentVehiclesMember" xlink:label="ck0001899017_EquityInterestInInvestmentVehiclesMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeCategorizationMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel1Member" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="us-gaap_InterestRateSwapMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_FirstLienSeniorSecuredLoansMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_ForeignExchangeForwardMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="us-gaap_CashAndCashEquivalentsFairValueDisclosure" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel2Member" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_SecondLienSeniorSecuredLoanMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_InvestmentTypeAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="us-gaap_DerivativeLiabilities" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel3Member" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_SubordinatedDebtMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueMeasuredAtNetAssetValuePerShareMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_PreferredStockMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_FinancialInstrumentAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_EquitySecuritiesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_WarrantMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_EquityInterestInInvestmentVehiclesMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsReconciliationOfInvestmentDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis" xlink:label="us-gaap_InvestmentTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FirstLienSeniorSecuredLoansMember" xlink:label="ck0001899017_FirstLienSeniorSecuredLoansMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SecondLienSeniorSecuredLoansMember" xlink:label="ck0001899017_SecondLienSeniorSecuredLoansMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesMember" xlink:label="us-gaap_EquitySecuritiesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPaidInKindInterest" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPaidInKindInterest"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAccretionAmortizationOfDiscountPremium" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAccretionAmortizationOfDiscountPremium"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubordinatedDebtMember" xlink:label="us-gaap_SubordinatedDebtMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLossSubsidiary" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLossSubsidiary"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNoteInInvestmentVehiclesMember" xlink:label="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsSubsidiary" xlink:label="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsSubsidiary"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossSubsidiary" xlink:label="ck0001899017_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossSubsidiary"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeCategorizationMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel3Member" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_FirstLienSeniorSecuredLoansMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="us-gaap_InvestmentTypeAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_SecondLienSeniorSecuredLoansMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationTable" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetPurchases" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_EquitySecuritiesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPaidInKindInterest" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_PreferredStockMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAccretionAmortizationOfDiscountPremium" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_SubordinatedDebtMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetSales" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_WarrantMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLossSubsidiary" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsSubsidiary" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetTransfersNet" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationLineItems" xlink:to="ck0001899017_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossSubsidiary" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfSignificantUnobservableInputsUsedToValueLevel3AssetsDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedMember" xlink:label="ck0001899017_SubordinatedMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueAxis" xlink:label="us-gaap_ValuationTechniqueAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="us-gaap_ValuationTechniqueDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDomain" xlink:label="us-gaap_ValuationTechniqueDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ValuationTechniqueDiscountedCashFlowMember" xlink:label="us-gaap_ValuationTechniqueDiscountedCashFlowMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="us-gaap_MeasurementInputTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputComparabilityAdjustmentMember" xlink:label="us-gaap_MeasurementInputComparabilityAdjustmentMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FirstLienSeniorSecuredLoansMember" xlink:label="ck0001899017_FirstLienSeniorSecuredLoansMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeAxis" xlink:label="us-gaap_MeasurementInputTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputTypeDomain" xlink:label="us-gaap_MeasurementInputTypeDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentsOwnedExcludingInvestmentsUnobservableInputsNotDeveloped" xlink:label="ck0001899017_InvestmentsOwnedExcludingInvestmentsUnobservableInputsNotDeveloped"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByAssetClassAxis" xlink:label="us-gaap_FairValueByAssetClassAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:label="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesMember" xlink:label="us-gaap_EquitySecuritiesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ValuationTechniqueComparableCompanyMultipleMember" xlink:label="ck0001899017_ValuationTechniqueComparableCompanyMultipleMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputEbitdaMultipleMember" xlink:label="us-gaap_MeasurementInputEbitdaMultipleMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SecondLienSeniorSecuredLoansMember" xlink:label="ck0001899017_SecondLienSeniorSecuredLoansMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AlternativeInvestmentMeasurementInput" xlink:label="us-gaap_AlternativeInvestmentMeasurementInput"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ValuationTechniqueCollateralCoverageMember" xlink:label="ck0001899017_ValuationTechniqueCollateralCoverageMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MeasurementInputRecoveryRateMember" xlink:label="ck0001899017_MeasurementInputRecoveryRateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_WeightedAverageMember" xlink:label="srt_WeightedAverageMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedNoteInInvestmentVehiclesMember" xlink:label="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeExtensibleEnumeration" xlink:label="us-gaap_InvestmentTypeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WarrantMember" xlink:label="us-gaap_WarrantMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputDiscountRateMember" xlink:label="us-gaap_MeasurementInputDiscountRateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MeasurementInputBookValueMultipleMember" xlink:label="ck0001899017_MeasurementInputBookValueMultipleMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_MeasurementInputRevenueMultipleMember" xlink:label="us-gaap_MeasurementInputRevenueMultipleMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:to="ck0001899017_SubordinatedMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_ValuationTechniqueAxis" xlink:to="us-gaap_ValuationTechniqueDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_ValuationTechniqueAxis" xlink:to="us-gaap_ValuationTechniqueDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_FinancialInstrumentAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ValuationTechniqueDomain" xlink:to="us-gaap_ValuationTechniqueDiscountedCashFlowMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputComparabilityAdjustmentMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MinimumMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel3Member" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_FirstLienSeniorSecuredLoansMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_MeasurementInputTypeAxis" xlink:to="us-gaap_MeasurementInputTypeDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_MeasurementInputTypeAxis" xlink:to="us-gaap_MeasurementInputTypeDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="ck0001899017_InvestmentsOwnedExcludingInvestmentsUnobservableInputsNotDeveloped" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FairValueByAssetClassAxis" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_FairValueByAssetClassAxis" xlink:to="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:to="us-gaap_EquitySecuritiesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_ValuationTechniqueAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ValuationTechniqueDomain" xlink:to="ck0001899017_ValuationTechniqueComparableCompanyMultipleMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputEbitdaMultipleMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MaximumMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_SecondLienSeniorSecuredLoansMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_AlternativeInvestmentMeasurementInput" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:to="us-gaap_PreferredStockMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_MeasurementInputTypeAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ValuationTechniqueDomain" xlink:to="ck0001899017_ValuationTechniqueCollateralCoverageMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="ck0001899017_MeasurementInputRecoveryRateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_WeightedAverageMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_InvestmentTypeExtensibleEnumeration" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsMeasuredOnRecurringBasisUnobservableInputReconciliationByAssetClassDomain" xlink:to="us-gaap_WarrantMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="srt_RangeAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputDiscountRateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="ck0001899017_MeasurementInputBookValueMultipleMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_FairValueByAssetClassAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_MeasurementInputTypeDomain" xlink:to="us-gaap_MeasurementInputRevenueMultipleMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfSignificantUnobservableInputsUsedToValueLevel3AssetsParentheticalDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" xlink:label="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsFairValueDisclosure" xlink:label="us-gaap_AssetsFairValueDisclosure"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesTable" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel3Member" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisValuationTechniquesLineItems" xlink:to="us-gaap_AssetsFairValueDisclosure" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFairValueMeasurementsSummaryOfDebtObligationsCarriedAtFairValueDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:label="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:label="us-gaap_FairValueByFairValueHierarchyLevelAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:label="us-gaap_FairValueMeasurementsFairValueHierarchyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GsRevolvingCreditFacilityMember" xlink:label="ck0001899017_GsRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFairValue" xlink:label="us-gaap_DebtInstrumentFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_Series2025SeniorNotesMember" xlink:label="ck0001899017_Series2025SeniorNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel3Member" xlink:label="us-gaap_FairValueInputsLevel3Member"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JpmRevolvingCreditFacilityMember" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FairValueInputsLevel2Member" xlink:label="us-gaap_FairValueInputsLevel2Member"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheAMember" xlink:label="ck0001899017_TrancheAMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBMember" xlink:label="ck0001899017_TrancheBMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FairValueByFairValueHierarchyLevelAxis" xlink:to="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_GsRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisLineItems" xlink:to="us-gaap_DebtInstrumentFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_Series2025SeniorNotesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel3Member" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_FairValueByFairValueHierarchyLevelAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_JpmRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_FairValueMeasurementsFairValueHierarchyDomain" xlink:to="us-gaap_FairValueInputsLevel2Member" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_DebtInstrumentAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_SmbcRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_FairValueAssetsAndLiabilitiesMeasuredOnRecurringAndNonrecurringBasisTable" xlink:to="us-gaap_CreditFacilityAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheAMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheBMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementBaseManagementFeeDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BcsfAdvisorsLpMember" xlink:label="ck0001899017_BcsfAdvisorsLpMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementAndServiceFeesBaseRate" xlink:label="us-gaap_ManagementAndServiceFeesBaseRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementFeeExpense" xlink:label="us-gaap_ManagementFeeExpense"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ManagementFeeExpenseContractuallyWaived" xlink:label="ck0001899017_ManagementFeeExpenseContractuallyWaived"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ManagementFeeExpenseVoluntarilyWaived" xlink:label="ck0001899017_ManagementFeeExpenseVoluntarilyWaived"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementFeePayable" xlink:label="us-gaap_ManagementFeePayable"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="ck0001899017_BcsfAdvisorsLpMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ManagementAndServiceFeesBaseRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ManagementFeeExpense" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_ManagementFeeExpenseContractuallyWaived" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_ManagementFeeExpenseVoluntarilyWaived" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ManagementFeePayable" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementIncentiveFeeDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="us-gaap_RelatedPartyTransactionAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="us-gaap_RelatedPartyTransactionDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="us-gaap_RelatedPartyTransactionDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BcsfAdvisorsLpMember" xlink:label="ck0001899017_BcsfAdvisorsLpMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfPrecedingCalendarQuarters" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfPrecedingCalendarQuarters"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_IncentiveFeeBasedOnIncomeMember" xlink:label="ck0001899017_IncentiveFeeBasedOnIncomeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfTrailingQuarters" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfTrailingQuarters"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreIncentiveFeeNetInvestmentIncomeEqualToLessThanCatchUpAmountMember" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeEqualToLessThanCatchUpAmountMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeeExpense" xlink:label="us-gaap_IncentiveFeeExpense"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreIncentiveFeeNetInvestmentIncomeLessThanOrEqualToCatchUpAmountMember" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeLessThanOrEqualToCatchUpAmountMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyTotalReturnBeforeIncentiveFees" xlink:label="us-gaap_InvestmentCompanyTotalReturnBeforeIncentiveFees"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember" xlink:label="ck0001899017_PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayable" xlink:label="us-gaap_IncentiveFeePayable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_IncentiveFeeCapMember" xlink:label="ck0001899017_IncentiveFeeCapMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_IncentiveFeesVoluntarilyWaived" xlink:label="ck0001899017_IncentiveFeesVoluntarilyWaived"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GaapIncentiveFeeMember" xlink:label="ck0001899017_GaapIncentiveFeeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis" xlink:label="ck0001899017_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CatchUpAmountPercentMultipliedToNav" xlink:label="ck0001899017_CatchUpAmountPercentMultipliedToNav"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyIncentiveFeeToAverageNetAssets" xlink:label="us-gaap_InvestmentCompanyIncentiveFeeToAverageNetAssets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayableCapitalGainBased" xlink:label="us-gaap_IncentiveFeePayableCapitalGainBased"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="ck0001899017_BcsfAdvisorsLpMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfPrecedingCalendarQuarters" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_IncentiveFeeBasedOnIncomeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfTrailingQuarters" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_PreIncentiveFeeNetInvestmentIncomeEqualToLessThanCatchUpAmountMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_IncentiveFeeExpense" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_PreIncentiveFeeNetInvestmentIncomeLessThanOrEqualToCatchUpAmountMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_InvestmentCompanyTotalReturnBeforeIncentiveFees" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_IncentiveFeePayable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_IncentiveFeeCapMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_IncentiveFeesVoluntarilyWaived" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_GaapIncentiveFeeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_CatchUpAmountPercentMultipliedToNav" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_InvestmentCompanyIncentiveFeeToAverageNetAssets" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_IncentiveFeePayableCapitalGainBased" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementAdministrationAgreementDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="us-gaap_BalanceSheetLocationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesMember" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationAxis" xlink:label="us-gaap_BalanceSheetLocationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_BalanceSheetLocationDomain" xlink:label="us-gaap_BalanceSheetLocationDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdministrativeServiceMember" xlink:label="us-gaap_AdministrativeServiceMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationAxis" xlink:label="us-gaap_IncomeStatementLocationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementLocationDomain" xlink:label="us-gaap_IncomeStatementLocationDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdministrativeFeesExpense" xlink:label="us-gaap_AdministrativeFeesExpense"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubAdministratorMember" xlink:label="ck0001899017_SubAdministratorMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdministrativeFeePayable" xlink:label="us-gaap_AdministrativeFeePayable"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_BalanceSheetLocationDomain" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_BalanceSheetLocationAxis" xlink:to="us-gaap_BalanceSheetLocationDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_BalanceSheetLocationAxis" xlink:to="us-gaap_BalanceSheetLocationDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_AdministrativeServiceMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_IncomeStatementLocationAxis" xlink:to="us-gaap_IncomeStatementLocationDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_AdministrativeFeesExpense" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="ck0001899017_SubAdministratorMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_BalanceSheetLocationAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_AdministrativeFeePayable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_IncomeStatementLocationAxis" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementResourceSharingAgreementDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BcsfAdvisorsLpMember" xlink:label="ck0001899017_BcsfAdvisorsLpMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PeriodOfTerminationByNotice" xlink:label="ck0001899017_PeriodOfTerminationByNotice"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="ck0001899017_BcsfAdvisorsLpMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PeriodOfTerminationByNotice" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementRelatedPartyCommitmentsDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAdviceMember" xlink:label="us-gaap_InvestmentAdviceMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesOutstanding" xlink:label="us-gaap_CommonStockSharesOutstanding"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassISharesMember" xlink:label="ck0001899017_ClassISharesMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_InvestmentAdviceMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_CommonStockSharesOutstanding" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassISharesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_StatementClassOfStockAxis" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementScheduleOfNoncontrolledaffiliateAndControlledAffiliateInvestmentsDet">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="srt_EquityMethodInvesteeNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeAxis" xlink:label="us-gaap_InvestmentTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BCCCPKInvestments2LPEquityInterestMember" xlink:label="ck0001899017_BCCCPKInvestments2LPEquityInterestMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationAxis" xlink:label="us-gaap_InvestmentIssuerAffiliationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonClassAMember" xlink:label="us-gaap_CommonClassAMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CPKIPCOBuyerLLCSubordinatedDebtMember" xlink:label="ck0001899017_CPKIPCOBuyerLLCSubordinatedDebtMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerControlledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerControlledMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EquityInterestMember" xlink:label="ck0001899017_EquityInterestMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LegacyCorporateLendingHoldcoLlcClassACommonEquityMember" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcClassACommonEquityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NonControlledAffiliateAndControlledAffiliateInvestmentsMember" xlink:label="ck0001899017_NonControlledAffiliateAndControlledAffiliateInvestmentsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PreferredStockMember" xlink:label="us-gaap_PreferredStockMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductions" xlink:label="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductions"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LegacyCorporateLendingHoldcoLlcPreferredEquityMember" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcPreferredEquityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubordinatedMember" xlink:label="ck0001899017_SubordinatedMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="us-gaap_UnrealizedGainLossOnInvestments"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCSubordinatedNoteInvestmentVehiclesMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCSubordinatedNoteInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="us-gaap_RealizedInvestmentGainsLosses"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCEquityInterestInvestmentVehiclesMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCEquityInterestInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BainCapitalSeniorLoanProgramIILLCPreferredEquityInterestInvestmentVehiclesMember" xlink:label="ck0001899017_BainCapitalSeniorLoanProgramIILLCPreferredEquityInterestInvestmentVehiclesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInterestAndDividend" xlink:label="us-gaap_InvestmentIncomeInterestAndDividend"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherNonoperatingIncomeExpense" xlink:label="us-gaap_OtherNonoperatingIncomeExpense"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="srt_EquityMethodInvesteeNameDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentTypeAxis" xlink:to="us-gaap_InvestmentTypeCategorizationMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BCCCPKInvestments2LPEquityInterestMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_InvestmentIssuerAffiliationAxis" xlink:to="us-gaap_InvestmentIssuerAffiliationDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_CommonClassAMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_InvestmentTypeAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_InvestmentOwnedAtFairValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_CPKIPCOBuyerLLCSubordinatedDebtMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerControlledMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_EquityInterestMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossAdditions" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_LegacyCorporateLendingHoldcoLlcClassACommonEquityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="ck0001899017_NonControlledAffiliateAndControlledAffiliateInvestmentsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="us-gaap_PreferredStockMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_InvestmentIssuerAffiliationAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_InvestmentsInAndAdvancesToAffiliatesAtFairValueGrossReductions" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_LegacyCorporateLendingHoldcoLlcPreferredEquityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_SubordinatedMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_UnrealizedGainLossOnInvestments" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCSubordinatedNoteInvestmentVehiclesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RealizedInvestmentGainsLosses" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCEquityInterestInvestmentVehiclesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BainCapitalSeniorLoanProgramIILLCPreferredEquityInterestInvestmentVehiclesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_InvestmentIncomeInterestAndDividend" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_OtherNonoperatingIncomeExpense" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementManagingDealerAgreementDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyMember" xlink:label="us-gaap_RelatedPartyMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassSSharesMember" xlink:label="ck0001899017_ClassSSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfManagingDealerReceiveAFeeOfOfferingProceeds" xlink:label="ck0001899017_PercentageOfManagingDealerReceiveAFeeOfOfferingProceeds"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassDSharesMember" xlink:label="ck0001899017_ClassDSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReceivedPurchaseOrders" xlink:label="ck0001899017_ReceivedPurchaseOrders"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOrSaleOfEquity" xlink:label="us-gaap_ProceedsFromIssuanceOrSaleOfEquity"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MaximumEstimatedManagingDealerFee" xlink:label="ck0001899017_MaximumEstimatedManagingDealerFee"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage" xlink:label="ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" xlink:label="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfUnderwiringCompensationOnGrossProceedsOfPrimaryOffering" xlink:label="ck0001899017_PercentageOfUnderwiringCompensationOnGrossProceedsOfPrimaryOffering"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DistributionAndShareholderServicingFees" xlink:label="ck0001899017_DistributionAndShareholderServicingFees"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="us-gaap_RelatedPartyMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_StatementClassOfStockAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RelatedPartyTransactionAmountsOfTransaction" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassSSharesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PercentageOfManagingDealerReceiveAFeeOfOfferingProceeds" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassDSharesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_ReceivedPurchaseOrders" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ProceedsFromIssuanceOrSaleOfEquity" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_MaximumEstimatedManagingDealerFee" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PercentageOfUnderwiringCompensationOnGrossProceedsOfPrimaryOffering" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_DistributionAndShareholderServicingFees" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementScheduleOfShareholderServicingAndorDistributionFeesDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RelatedPartyTransactionShareholderServicingAndDistributionFeesPercentage" xlink:label="ck0001899017_RelatedPartyTransactionShareholderServicingAndDistributionFeesPercentage"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassSSharesMember" xlink:label="ck0001899017_ClassSSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassDSharesMember" xlink:label="ck0001899017_ClassDSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassISharesMember" xlink:label="ck0001899017_ClassISharesMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_StatementClassOfStockAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_RelatedPartyTransactionShareholderServicingAndDistributionFeesPercentage" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassSSharesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassDSharesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassISharesMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementDistributionAndServicingPlanDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" xlink:label="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassSSharesMember" xlink:label="ck0001899017_ClassSSharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassDSharesMember" xlink:label="ck0001899017_ClassDSharesMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_StatementClassOfStockAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassSSharesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassDSharesMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementExpenseSupportAndConditionalReimbursementAgreementDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReimbursementPercentageOfOtherOperatingExpenses" xlink:label="ck0001899017_ReimbursementPercentageOfOtherOperatingExpenses"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_ReimbursementPercentageOfOtherOperatingExpenses" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureAgreementsAndRelatedPartyTransactionsInvestmentAdvisoryAgreementSummaryOfAllExpensesSupportedAndRecoupedByTheAdviserDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionLineItems" xlink:label="us-gaap_RelatedPartyTransactionLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:label="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAxis" xlink:label="us-gaap_RelatedPartyTransactionAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionDomain" xlink:label="us-gaap_RelatedPartyTransactionDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:label="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyDomain" xlink:label="us-gaap_RelatedPartyDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReimbursementEligibilityExpirationDateNovemberThirtyTwoThousandTwentySixMember" xlink:label="ck0001899017_ReimbursementEligibilityExpirationDateNovemberThirtyTwoThousandTwentySixMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionAmountsOfTransaction" xlink:label="us-gaap_RelatedPartyTransactionAmountsOfTransaction"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmountOfExpenseSupportMember" xlink:label="ck0001899017_AmountOfExpenseSupportMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReimbursementEligibilityExpirationDateJanuaryThirtyOneThousandTwentySevenMember" xlink:label="ck0001899017_ReimbursementEligibilityExpirationDateJanuaryThirtyOneThousandTwentySevenMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RelatedPartyTransactionRate" xlink:label="us-gaap_RelatedPartyTransactionRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RecoupmentOfExpenseSupportMember" xlink:label="ck0001899017_RecoupmentOfExpenseSupportMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RelatedPartyTransactionOperatingExpenseRatio" xlink:label="ck0001899017_RelatedPartyTransactionOperatingExpenseRatio"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UnreimbursedExpenseSupportMember" xlink:label="ck0001899017_UnreimbursedExpenseSupportMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionAxis" xlink:to="us-gaap_RelatedPartyTransactionDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" xlink:to="us-gaap_RelatedPartyDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="ck0001899017_ReimbursementEligibilityExpirationDateNovemberThirtyTwoThousandTwentySixMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RelatedPartyTransactionAmountsOfTransaction" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_AmountOfExpenseSupportMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyDomain" xlink:to="ck0001899017_ReimbursementEligibilityExpirationDateJanuaryThirtyOneThousandTwentySevenMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfRelatedPartyTransactionsByRelatedPartyTable" xlink:to="us-gaap_RelatedPartyTransactionsByRelatedPartyAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="us-gaap_RelatedPartyTransactionRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_RecoupmentOfExpenseSupportMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionLineItems" xlink:to="ck0001899017_RelatedPartyTransactionOperatingExpenseRatio" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_RelatedPartyTransactionDomain" xlink:to="ck0001899017_UnreimbursedExpenseSupportMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" xlink:label="us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="us-gaap_SubsequentEventTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember" xlink:label="us-gaap_SubsequentEventMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain" xlink:label="us-gaap_VariableRateDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AbrLoanMember" xlink:label="ck0001899017_AbrLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" xlink:label="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeMember" xlink:label="srt_RangeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MaximumMember" xlink:label="srt_MaximumMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateAxis" xlink:label="us-gaap_VariableRateAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioForecastMember" xlink:label="srt_ScenarioForecastMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="us-gaap_SubsequentEventTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="us-gaap_SubsequentEventTypeDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RangeAxis" xlink:label="srt_RangeAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentOfAssetCoverage" xlink:label="ck0001899017_PercentOfAssetCoverage"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CreditAdjustmentSpreadMember" xlink:label="ck0001899017_CreditAdjustmentSpreadMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RfrLoanMember" xlink:label="ck0001899017_RfrLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JpmRevolvingCreditFacilityMember" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_MinimumMember" xlink:label="srt_MinimumMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtWeightedAverageInterestRate" xlink:label="us-gaap_DebtWeightedAverageInterestRate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TermBenchmarkLoanMember" xlink:label="ck0001899017_TermBenchmarkLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityAverageOutstandingAmount" xlink:label="us-gaap_LineOfCreditFacilityAverageOutstandingAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheANotesMember" xlink:label="ck0001899017_TrancheANotesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_Series2025SeniorNotesMember" xlink:label="ck0001899017_Series2025SeniorNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBNotesMember" xlink:label="ck0001899017_TrancheBNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LineOfCreditFacilityCurrentBorrowingCapacityRegardingProvisionToPermitIncreasesOfTermAndRevolvingCommitments" xlink:label="ck0001899017_LineOfCreditFacilityCurrentBorrowingCapacityRegardingProvisionToPermitIncreasesOfTermAndRevolvingCommitments"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" xlink:label="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentInterestRateStatedPercentage" xlink:label="us-gaap_DebtInstrumentInterestRateStatedPercentage"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InvestmentCompanySeniorSecurityIndebtednessAssetCoverageRatio" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_VariableRateDomain" xlink:to="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_AbrLoanMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MaximumMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_VariableRateAxis" xlink:to="us-gaap_VariableRateDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="srt_ScenarioForecastMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_RangeAxis" xlink:to="srt_RangeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_PercentOfAssetCoverage" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_VariableRateDomain" xlink:to="ck0001899017_CreditAdjustmentSpreadMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_RfrLoanMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_JpmRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RangeMember" xlink:to="srt_MinimumMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtWeightedAverageInterestRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="srt_StatementScenarioAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TermBenchmarkLoanMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_SmbcRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityAverageOutstandingAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_SubsequentEventTypeAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheANotesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_Series2025SeniorNotesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_VariableRateAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheBNotesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityCurrentBorrowingCapacity" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="srt_RangeAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_LineOfCreditFacilityCurrentBorrowingCapacityRegardingProvisionToPermitIncreasesOfTermAndRevolvingCommitments" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentBasisSpreadOnVariableRate1" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentFaceAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentInterestRateStatedPercentage" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtOutstandingBorrowingsDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheAMember" xlink:label="ck0001899017_TrancheAMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" xlink:label="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="us-gaap_DebtInstrumentCarryingAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBMember" xlink:label="ck0001899017_TrancheBMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JpmRevolvingCreditFacilityMember" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_Series2025SeniorNotesMember" xlink:label="ck0001899017_Series2025SeniorNotesMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentFaceAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheAMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentCarryingAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheBMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_JpmRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LongTermDebt" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_SmbcRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_Series2025SeniorNotesMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtMaturitiesOfDebtObligationsDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentCarryingAmount" xlink:label="us-gaap_DebtInstrumentCarryingAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheAMember" xlink:label="ck0001899017_TrancheAMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" xlink:label="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtMaturingInYearsTwoAndThree" xlink:label="us-gaap_LongTermDebtMaturingInYearsTwoAndThree"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBMember" xlink:label="ck0001899017_TrancheBMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JpmRevolvingCreditFacilityMember" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebtMaturingInYearsFourAndFive" xlink:label="us-gaap_LongTermDebtMaturingInYearsFourAndFive"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_Series2025SeniorNotesMember" xlink:label="ck0001899017_Series2025SeniorNotesMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentCarryingAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheAMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LongTermDebtMaturingInYearsTwoAndThree" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheBMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_JpmRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LongTermDebtMaturingInYearsFourAndFive" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_SmbcRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_Series2025SeniorNotesMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnGoldmanSachsRevolvingCreditFacilityDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt" xlink:label="us-gaap_InterestExpenseDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" xlink:label="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeeAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDebtExpense" xlink:label="us-gaap_InterestAndDebtExpense"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestExpenseDebt" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityCommitmentFeeAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestAndDebtExpense" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnJpmRevolvingCreditFacilityDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt" xlink:label="us-gaap_InterestExpenseDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JpmRevolvingCreditFacilityMember" xlink:label="ck0001899017_JpmRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeeAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDebtExpense" xlink:label="us-gaap_InterestAndDebtExpense"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestExpenseDebt" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_JpmRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityCommitmentFeeAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestAndDebtExpense" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnSmbcRevolvingCreditFacilityDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt" xlink:label="us-gaap_InterestExpenseDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeeAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDebtExpense" xlink:label="us-gaap_InterestAndDebtExpense"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestExpenseDebt" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_SmbcRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_LineOfCreditFacilityCommitmentFeeAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestAndDebtExpense" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtScheduleOfComponentsOfCarryingValueDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ShortTermDebtLineItems" xlink:label="us-gaap_ShortTermDebtLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityTable" xlink:label="us-gaap_LineOfCreditFacilityTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheANotesMember" xlink:label="ck0001899017_TrancheANotesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_Series2025SeniorNotesMember" xlink:label="ck0001899017_Series2025SeniorNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBNotesMember" xlink:label="ck0001899017_TrancheBNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnamortizedDebtIssuanceExpense" xlink:label="us-gaap_UnamortizedDebtIssuanceExpense"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DebtInstrumentEffectiveInterestRateSwapHedge" xlink:label="ck0001899017_DebtInstrumentEffectiveInterestRateSwapHedge"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ShortTermDebtLineItems" xlink:to="us-gaap_LineOfCreditFacilityTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_LineOfCreditFacilityTable" xlink:to="us-gaap_CreditFacilityAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheANotesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_Series2025SeniorNotesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShortTermDebtLineItems" xlink:to="us-gaap_DebtInstrumentFaceAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_LineOfCreditFacilityTable" xlink:to="us-gaap_DebtInstrumentAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheBNotesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShortTermDebtLineItems" xlink:to="us-gaap_UnamortizedDebtIssuanceExpense" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShortTermDebtLineItems" xlink:to="ck0001899017_DebtInstrumentEffectiveInterestRateSwapHedge" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ShortTermDebtLineItems" xlink:to="us-gaap_LongTermDebt" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnSeries2025SeniorNotesDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentLineItems" xlink:label="us-gaap_DebtInstrumentLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentTable" xlink:label="us-gaap_DebtInstrumentTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt" xlink:label="us-gaap_InterestExpenseDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentNameDomain" xlink:label="us-gaap_DebtInstrumentNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheANotesMember" xlink:label="ck0001899017_TrancheANotesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_Series2025SeniorNotesMember" xlink:label="ck0001899017_Series2025SeniorNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentAxis" xlink:label="us-gaap_DebtInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TrancheBNotesMember" xlink:label="ck0001899017_TrancheBNotesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DebtInstrumentInterestRateSwaps" xlink:label="ck0001899017_DebtInstrumentInterestRateSwaps"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestExpenseRelatedToHedgedItems" xlink:label="ck0001899017_InterestExpenseRelatedToHedgedItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDebtExpense" xlink:label="us-gaap_InterestAndDebtExpense"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_DebtInstrumentTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestExpenseDebt" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_CreditFacilityAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheANotesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_Series2025SeniorNotesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DebtInstrumentAxis" xlink:to="us-gaap_DebtInstrumentNameDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DebtInstrumentTable" xlink:to="us-gaap_DebtInstrumentAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentNameDomain" xlink:to="ck0001899017_TrancheBNotesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_DebtInstrumentInterestRateSwaps" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="ck0001899017_InterestExpenseRelatedToHedgedItems" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DebtInstrumentLineItems" xlink:to="us-gaap_InterestAndDebtExpense" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems" xlink:label="us-gaap_DerivativeLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable" xlink:label="us-gaap_DerivativeTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilityFairValueOfCollateral" xlink:label="us-gaap_DerivativeLiabilityFairValueOfCollateral"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="us-gaap_ForeignExchangeForwardMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DerivativeInstrumentAverageNotionalAmount" xlink:label="ck0001899017_DerivativeInstrumentAverageNotionalAmount"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember" xlink:label="us-gaap_InterestRateSwapMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency" xlink:label="us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSaleOfDerivatives" xlink:label="us-gaap_GainLossOnSaleOfDerivatives"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet" xlink:label="us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_DerivativeTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_DerivativeLiabilityFairValueOfCollateral" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_ForeignExchangeForwardMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeLineItems" xlink:to="ck0001899017_DerivativeInstrumentAverageNotionalAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_InterestRateSwapMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_InvestmentCompanyRealizedAndUnrealizedGainLossOnInvestmentAndForeignCurrency" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_GainLossOnSaleOfDerivatives" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_GainLossOnForeignCurrencyDerivativesRecordedInEarningsNet" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesOffsetOfAssetsAndLiabilitiesDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OffsettingAssetsLineItems" xlink:label="us-gaap_OffsettingAssetsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OffsettingAssetsTable" xlink:label="us-gaap_OffsettingAssetsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis" xlink:label="srt_CounterpartyNameAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAsset"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BankOfNewYorkMember" xlink:label="ck0001899017_BankOfNewYorkMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="us-gaap_ForeignExchangeForwardMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:label="us-gaap_DerivativeFairValueOfDerivativeLiability"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BNPParibasMember" xlink:label="ck0001899017_BNPParibasMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember" xlink:label="us-gaap_InterestRateSwapMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WellsFargoMember" xlink:label="ck0001899017_WellsFargoMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset" xlink:label="us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_OffsettingAssetsLineItems" xlink:to="us-gaap_OffsettingAssetsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_OffsettingAssetsTable" xlink:to="srt_CounterpartyNameAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OffsettingAssetsLineItems" xlink:to="us-gaap_DerivativeFairValueOfDerivativeAsset" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="ck0001899017_BankOfNewYorkMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_ForeignExchangeForwardMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_OffsettingAssetsTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OffsettingAssetsLineItems" xlink:to="us-gaap_DerivativeFairValueOfDerivativeLiability" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="ck0001899017_BNPParibasMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_InterestRateSwapMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OffsettingAssetsLineItems" xlink:to="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="ck0001899017_WellsFargoMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OffsettingAssetsLineItems" xlink:to="us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OffsettingAssetsLineItems" xlink:to="us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesEffectOfTransactionsInDerivativeInstrumentsDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems" xlink:label="us-gaap_DerivativeLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable" xlink:label="us-gaap_DerivativeTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="us-gaap_RealizedInvestmentGainsLosses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignExchangeForwardMember" xlink:label="us-gaap_ForeignExchangeForwardMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSaleOfDerivatives" xlink:label="us-gaap_GainLossOnSaleOfDerivatives"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_DerivativeTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_RealizedInvestmentGainsLosses" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_ForeignExchangeForwardMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_GainLossOnSaleOfDerivatives" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesNetRealizedAndUnrealizedGainsAndLossesDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLineItems" xlink:label="us-gaap_DerivativeLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeTable" xlink:label="us-gaap_DerivativeTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeGainLossOnDerivativeNet" xlink:label="us-gaap_DerivativeGainLossOnDerivativeNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain" xlink:label="us-gaap_HedgingDesignationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DesignatedAsHedgingInstrumentMember" xlink:label="us-gaap_DesignatedAsHedgingInstrumentMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationAxis" xlink:label="us-gaap_HedgingDesignationAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingDesignationDomain" xlink:label="us-gaap_HedgingDesignationDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeInstrumentRiskAxis" xlink:label="us-gaap_DerivativeInstrumentRiskAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeContractTypeDomain" xlink:label="us-gaap_DerivativeContractTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestRateSwapMember" xlink:label="us-gaap_InterestRateSwapMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration" xlink:label="us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgeFundsMember" xlink:label="us-gaap_HedgeFundsMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_DerivativeTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_DerivativeGainLossOnDerivativeNet" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_HedgingDesignationDomain" xlink:to="us-gaap_DesignatedAsHedgingInstrumentMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_HedgingDesignationAxis" xlink:to="us-gaap_HedgingDesignationDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_HedgingDesignationAxis" xlink:to="us-gaap_HedgingDesignationDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_DerivativeInstrumentRiskAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_DerivativeInstrumentRiskAxis" xlink:to="us-gaap_DerivativeContractTypeDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_InterestRateSwapMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeLineItems" xlink:to="us-gaap_DerivativeGainLossStatementOfIncomeOrComprehensiveIncomeExtensibleEnumeration" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DerivativeTable" xlink:to="us-gaap_HedgingDesignationAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DerivativeContractTypeDomain" xlink:to="us-gaap_HedgeFundsMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfTransactionsInCommonSharesDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockLineItems" xlink:label="us-gaap_ClassOfStockLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="us-gaap_ScheduleOfStockByClassTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesNewIssues" xlink:label="us-gaap_StockIssuedDuringPeriodSharesNewIssues"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassIMember" xlink:label="ck0001899017_CommonClassIMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_StockRepurchasedDuringPeriodIncludingEarlyRepurchaseDeduction" xlink:label="ck0001899017_StockRepurchasedDuringPeriodIncludingEarlyRepurchaseDeduction"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EarlyRepurchaseDeductionValue" xlink:label="ck0001899017_EarlyRepurchaseDeductionValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" xlink:label="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:label="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease" xlink:label="us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction" xlink:label="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ScheduleOfStockByClassTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodSharesNewIssues" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassIMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_StatementClassOfStockAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodValueNewIssues" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_StockRepurchasedDuringPeriodShares" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="ck0001899017_StockRepurchasedDuringPeriodIncludingEarlyRepurchaseDeduction" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="ck0001899017_EarlyRepurchaseDeductionValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodSharesDividendReinvestmentPlan" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_StockIssuedDuringPeriodSharesPeriodIncreaseDecrease" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfMonthendNavPerShareDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockLineItems" xlink:label="us-gaap_ClassOfStockLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="us-gaap_ScheduleOfStockByClassTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetAssetValuePerShare" xlink:label="us-gaap_NetAssetValuePerShare"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassIMember" xlink:label="ck0001899017_CommonClassIMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ScheduleOfStockByClassTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_NetAssetValuePerShare" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassIMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_StatementClassOfStockAxis" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfDistributionsDeclaredAndPayableDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable" xlink:label="us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDeclarationDate" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDeclarationDate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardDateAxis" xlink:label="us-gaap_AwardDateAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardDateDomain" xlink:label="us-gaap_AwardDateDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AwardDateDomain" xlink:label="us-gaap_AwardDateDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeMember" xlink:label="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassIMember" xlink:label="ck0001899017_CommonClassIMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDateOfRecord" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDateOfRecord"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeOneMember" xlink:label="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeOneMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDistributionDate" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDistributionDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineDecemberTwoThousandTwentyThreeMember" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyThreeMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit" xlink:label="us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JanuaryThirtyFirstTwoThousandTwentyFourMember" xlink:label="ck0001899017_JanuaryThirtyFirstTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineFebruaryTwoThousandTwentyFourMember" xlink:label="ck0001899017_TwentyNineFebruaryTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineMarchTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_TwentyNineMarchTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ThirtyAprilTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_ThirtyAprilTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ThirtyMayTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_ThirtyMayTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySevenJuneTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_TwentySevenJuneTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SeventeenJulyTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_SeventeenJulyTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyThreeAugustTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_TwentyThreeAugustTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyFifthOctoberTwoThousandTwentyFourMember" xlink:label="ck0001899017_TwentyFifthOctoberTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySecondNovemberTwoThousandTwentyFourMember" xlink:label="ck0001899017_TwentySecondNovemberTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourMember" xlink:label="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourOneMember" xlink:label="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineJanuaryTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentyNineJanuaryTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyFourFebruaryTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentyFourFebruaryTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SeventeenMarchTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_SeventeenMarchTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyFourAprilTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentyFourAprilTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyEightMayTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentyEightMayTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveOneMember" xlink:label="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EighteenJulyTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_EighteenJulyTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySevenAugustTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentySevenAugustTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveOneMember" xlink:label="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SixteenOctoberTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_SixteenOctoberTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentySixNovemberTwoThousandAndTwentyFiveMember" xlink:label="ck0001899017_TwentySixNovemberTwoThousandAndTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveMember" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveOneMember" xlink:label="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveOneMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ThirtyOneJanuaryTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_ThirtyOneJanuaryTwoThousandAndTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TwentyNineFebruaryTwoThousandAndTwentyFourMember" xlink:label="ck0001899017_TwentyNineFebruaryTwoThousandAndTwentyFourMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" xlink:to="us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDeclarationDate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable" xlink:to="us-gaap_AwardDateAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_AwardDateAxis" xlink:to="us-gaap_AwardDateDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_AwardDateAxis" xlink:to="us-gaap_AwardDateDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassIMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDateOfRecord" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_DistributionsMadeToLimitedLiabilityCompanyLLCMemberTable" xlink:to="us-gaap_StatementClassOfStockAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeOneMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberDistributionDate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyNineDecemberTwoThousandTwentyThreeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" xlink:to="us-gaap_DistributionMadeToLimitedPartnerDistributionsDeclaredPerUnit" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_JanuaryThirtyFirstTwoThousandTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberLineItems" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyNineFebruaryTwoThousandTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyNineMarchTwoThousandAndTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_ThirtyAprilTwoThousandAndTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_ThirtyMayTwoThousandAndTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentySevenJuneTwoThousandAndTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_SeventeenJulyTwoThousandAndTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyThreeAugustTwoThousandAndTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyFifthOctoberTwoThousandTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="13" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentySecondNovemberTwoThousandTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="14" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="15" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourOneMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="16" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyNineJanuaryTwoThousandAndTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="17" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyFourFebruaryTwoThousandAndTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="18" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_SeventeenMarchTwoThousandAndTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="19" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyFourAprilTwoThousandAndTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="20" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyEightMayTwoThousandAndTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="21" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="22" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveOneMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="23" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_EighteenJulyTwoThousandAndTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="24" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentySevenAugustTwoThousandAndTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="25" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="26" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveOneMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="27" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_SixteenOctoberTwoThousandAndTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="28" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentySixNovemberTwoThousandAndTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="29" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="30" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveOneMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="31" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_ThirtyOneJanuaryTwoThousandAndTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="32" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AwardDateDomain" xlink:to="ck0001899017_TwentyNineFebruaryTwoThousandAndTwentyFourMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockLineItems" xlink:label="us-gaap_ClassOfStockLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfStockByClassTable" xlink:label="us-gaap_ScheduleOfStockByClassTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesOutstanding" xlink:label="us-gaap_SharesOutstanding"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassSMember" xlink:label="ck0001899017_CommonClassSMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_StockRepurchaseProgramMonthlyRedemptionsPercentOfNetAssetValueMaximum" xlink:label="ck0001899017_StockRepurchaseProgramMonthlyRedemptionsPercentOfNetAssetValueMaximum"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CommonClassDMember" xlink:label="ck0001899017_CommonClassDMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ShareRedemptionPriceUsedPercentOfMostRecentlyDisclosedNetAssetValue" xlink:label="ck0001899017_ShareRedemptionPriceUsedPercentOfMostRecentlyDisclosedNetAssetValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_StockRepurchaseProgramHoldingPeriod" xlink:label="ck0001899017_StockRepurchaseProgramHoldingPeriod"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_ScheduleOfStockByClassTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_SharesOutstanding" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassSMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfStockByClassTable" xlink:to="us-gaap_StatementClassOfStockAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="ck0001899017_StockRepurchaseProgramMonthlyRedemptionsPercentOfNetAssetValueMaximum" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_CommonClassDMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="ck0001899017_ShareRedemptionPriceUsedPercentOfMostRecentlyDisclosedNetAssetValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="ck0001899017_StockRepurchaseProgramHoldingPeriod" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockLineItems" xlink:to="us-gaap_StockRepurchasedDuringPeriodShares" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureNetAssetsScheduleOfShareRepurchasesDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramLineItems" xlink:label="srt_ShareRepurchaseProgramLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramTable" xlink:label="srt_ShareRepurchaseProgramTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramAxis" xlink:label="srt_ShareRepurchaseProgramAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramDomain" xlink:label="srt_ShareRepurchaseProgramDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ShareRepurchaseProgramDomain" xlink:label="srt_ShareRepurchaseProgramDomain_default"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnMarchThreeTwoThousandTwentyFiveMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnMarchThreeTwoThousandTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StockRepurchaseProgramExpirationDate" xlink:label="srt_StockRepurchaseProgramExpirationDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnJuneTwoTwoThousandTwentyFiveMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnJuneTwoTwoThousandTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfOutstandingSharesTheCompanyOfferedToRepurchase" xlink:label="ck0001899017_PercentageOfOutstandingSharesTheCompanyOfferedToRepurchase"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnAugustTwentyNineTwoThousandTwentyFiveMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnAugustTwentyNineTwoThousandTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepurchaseAgreementDateOfRepurchase" xlink:label="us-gaap_RepurchaseAgreementDateOfRepurchase"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnDecemberTenTwoThousandTwentyFiveMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnDecemberTenTwoThousandTwentyFiveMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnFebruaryTwentyNineTwoThousandTwentyFourMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnFebruaryTwentyNineTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodShares" xlink:label="us-gaap_StockRepurchasedDuringPeriodShares"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnMayThirtyOneTwoThousandTwentyFourMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnMayThirtyOneTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfOutstandingSharesPurchased" xlink:label="ck0001899017_PercentageOfOutstandingSharesPurchased"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnAugustThirtyOneTwoThousandTwentyFourMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnAugustThirtyOneTwoThousandTwentyFourMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseRequestDeadlineOnNovemberThirtyTwoThousandTwentyFourMember" xlink:label="ck0001899017_RepurchaseRequestDeadlineOnNovemberThirtyTwoThousandTwentyFourMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="srt_ShareRepurchaseProgramLineItems" xlink:to="srt_ShareRepurchaseProgramTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="srt_ShareRepurchaseProgramTable" xlink:to="srt_ShareRepurchaseProgramAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ShareRepurchaseProgramAxis" xlink:to="srt_ShareRepurchaseProgramDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="srt_ShareRepurchaseProgramAxis" xlink:to="srt_ShareRepurchaseProgramDomain_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnMarchThreeTwoThousandTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ShareRepurchaseProgramLineItems" xlink:to="srt_StockRepurchaseProgramExpirationDate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnJuneTwoTwoThousandTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ShareRepurchaseProgramLineItems" xlink:to="ck0001899017_PercentageOfOutstandingSharesTheCompanyOfferedToRepurchase" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnAugustTwentyNineTwoThousandTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ShareRepurchaseProgramLineItems" xlink:to="us-gaap_RepurchaseAgreementDateOfRepurchase" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnDecemberTenTwoThousandTwentyFiveMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ShareRepurchaseProgramLineItems" xlink:to="us-gaap_StockRepurchasedDuringPeriodValue" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnFebruaryTwentyNineTwoThousandTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ShareRepurchaseProgramLineItems" xlink:to="us-gaap_StockRepurchasedDuringPeriodShares" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnMayThirtyOneTwoThousandTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ShareRepurchaseProgramLineItems" xlink:to="ck0001899017_PercentageOfOutstandingSharesPurchased" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnAugustThirtyOneTwoThousandTwentyFourMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ShareRepurchaseProgramDomain" xlink:to="ck0001899017_RepurchaseRequestDeadlineOnNovemberThirtyTwoThousandTwentyFourMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureCommitmentsAndContingenciesSummaryOfUnfundedCommitmentsUnderLoanAndFinancingAgreementsDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsLineItems" xlink:label="us-gaap_OtherCommitmentsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherCommitmentsTable" xlink:label="us-gaap_OtherCommitmentsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:label="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_EquityMethodInvesteeNameDomain" xlink:label="srt_EquityMethodInvesteeNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnusedCommitmentsToExtendCredit" xlink:label="us-gaap_UnusedCommitmentsToExtendCredit"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ACAMSMember" xlink:label="ck0001899017_ACAMSMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_FinancialInstrumentAxis" xlink:label="us-gaap_FinancialInstrumentAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:label="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FirstLienSeniorSecuredLoanMember" xlink:label="ck0001899017_FirstLienSeniorSecuredLoanMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AccidentCareAllianceHoldcoLLCMember" xlink:label="ck0001899017_AccidentCareAllianceHoldcoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RevolverCommitmentMember" xlink:label="ck0001899017_RevolverCommitmentMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AdvancedAircrewMember" xlink:label="ck0001899017_AdvancedAircrewMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DelayedDrawCommitmentMember" xlink:label="ck0001899017_DelayedDrawCommitmentMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AegVisionMember" xlink:label="ck0001899017_AegVisionMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DelayedDrawCommitment1Member" xlink:label="ck0001899017_DelayedDrawCommitment1Member"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AeriTekGlobalCADAcquisitionIncMember" xlink:label="ck0001899017_AeriTekGlobalCADAcquisitionIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DelayedDrawCommitment2Member" xlink:label="ck0001899017_DelayedDrawCommitment2Member"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AgrofreshSolutionsMember" xlink:label="ck0001899017_AgrofreshSolutionsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AGSAmericanGlassServicesAcquisitionLLCMember" xlink:label="ck0001899017_AGSAmericanGlassServicesAcquisitionLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AllbridgeMember" xlink:label="ck0001899017_AllbridgeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AlldentHoldingGmbHMember" xlink:label="ck0001899017_AlldentHoldingGmbHMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AMIMember" xlink:label="ck0001899017_AMIMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AOMInfusionMember" xlink:label="ck0001899017_AOMInfusionMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ApprissMember" xlink:label="ck0001899017_ApprissMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AsprPacAcquisitionCoLlcMember" xlink:label="ck0001899017_AsprPacAcquisitionCoLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AtsMember" xlink:label="ck0001899017_AtsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AvalonBidcoLimitedMember" xlink:label="ck0001899017_AvalonBidcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AwaydayMember" xlink:label="ck0001899017_AwaydayMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BeaconSpecializedLivingMember" xlink:label="ck0001899017_BeaconSpecializedLivingMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BlackbirdPurchaserIncMember" xlink:label="ck0001899017_BlackbirdPurchaserIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BLIBuyerIncMember" xlink:label="ck0001899017_BLIBuyerIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BridgerAerospaceGroupHoldingsIncMember" xlink:label="ck0001899017_BridgerAerospaceGroupHoldingsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BtxPrecisionMember" xlink:label="ck0001899017_BtxPrecisionMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChaseIndustriesIncMember" xlink:label="ck0001899017_ChaseIndustriesIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChexFinerFoodsLLCMember" xlink:label="ck0001899017_ChexFinerFoodsLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChiltonMember" xlink:label="ck0001899017_ChiltonMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ChoreoMember" xlink:label="ck0001899017_ChoreoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CityBbqMember" xlink:label="ck0001899017_CityBbqMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CubeMember" xlink:label="ck0001899017_CubeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DiscoverySeniorLivingMember" xlink:label="ck0001899017_DiscoverySeniorLivingMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DtiqTechnologiesIncMember" xlink:label="ck0001899017_DtiqTechnologiesIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DuracoMember" xlink:label="ck0001899017_DuracoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EasyIceLLCMember" xlink:label="ck0001899017_EasyIceLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EasyIceMember" xlink:label="ck0001899017_EasyIceMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EheHealthMember" xlink:label="ck0001899017_EheHealthMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ElectronicMerchantSystemsMember" xlink:label="ck0001899017_ElectronicMerchantSystemsMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ElevationNewCoLLCMember" xlink:label="ck0001899017_ElevationNewCoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EngineeredProductsCoLLCMember" xlink:label="ck0001899017_EngineeredProductsCoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ETechGroupMember" xlink:label="ck0001899017_ETechGroupMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EXTAcquisitionsIncMember" xlink:label="ck0001899017_EXTAcquisitionsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FactsGlobalEnergyMember" xlink:label="ck0001899017_FactsGlobalEnergyMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FiduciaireJean-MarcFaberFJMFMember" xlink:label="ck0001899017_FiduciaireJean-MarcFaberFJMFMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FiftyUSBidcoIncMember" xlink:label="ck0001899017_FiftyUSBidcoIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_G702BuyerIncMember" xlink:label="ck0001899017_G702BuyerIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GalanthusGroupHoldingsLimitedMember" xlink:label="ck0001899017_GalanthusGroupHoldingsLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GovineerSolutionsFkaBlackMountainMember" xlink:label="ck0001899017_GovineerSolutionsFkaBlackMountainMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HeadsUpTechnologiesIncMember" xlink:label="ck0001899017_HeadsUpTechnologiesIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HellersMember" xlink:label="ck0001899017_HellersMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HempzMember" xlink:label="ck0001899017_HempzMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HumicAcquisitionHoldingsLLCMember" xlink:label="ck0001899017_HumicAcquisitionHoldingsLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ICATLogisticsIncMember" xlink:label="ck0001899017_ICATLogisticsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_KAMCHoldingsIncMember" xlink:label="ck0001899017_KAMCHoldingsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LindstromLLCMember" xlink:label="ck0001899017_LindstromLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LogrhythmMember" xlink:label="ck0001899017_LogrhythmMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MasterConcessionAirMember" xlink:label="ck0001899017_MasterConcessionAirMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MeteorUKBidcoLimitedMember" xlink:label="ck0001899017_MeteorUKBidcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MonarchFincoLLCMember" xlink:label="ck0001899017_MonarchFincoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NafincoMember" xlink:label="ck0001899017_NafincoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NewMilaniGroupLLCMember" xlink:label="ck0001899017_NewMilaniGroupLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OdysseyBehavioralHealthMember" xlink:label="ck0001899017_OdysseyBehavioralHealthMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OghBidcoLimitedMember" xlink:label="ck0001899017_OghBidcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OwlAcquisitionLLCMember" xlink:label="ck0001899017_OwlAcquisitionLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PayRangeMember" xlink:label="ck0001899017_PayRangeMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PcfMember" xlink:label="ck0001899017_PcfMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PharmacyPartnersMember" xlink:label="ck0001899017_PharmacyPartnersMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PlaskolitePPCIntermediateIILLCMember" xlink:label="ck0001899017_PlaskolitePPCIntermediateIILLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PMAMember" xlink:label="ck0001899017_PMAMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PolloTropicalMember" xlink:label="ck0001899017_PolloTropicalMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PPTGroupMember" xlink:label="ck0001899017_PPTGroupMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PrecisionConceptsParentIncMember" xlink:label="ck0001899017_PrecisionConceptsParentIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PRGXMember" xlink:label="ck0001899017_PRGXMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PsychiatricMedicalCareLLCMember" xlink:label="ck0001899017_PsychiatricMedicalCareLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PureWaferMember" xlink:label="ck0001899017_PureWaferMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_R1RCMIncMember" xlink:label="ck0001899017_R1RCMIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ReconomyMember" xlink:label="ck0001899017_ReconomyMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RedNucleusMember" xlink:label="ck0001899017_RedNucleusMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RedMedOperationsCollageRehabilitationMember" xlink:label="ck0001899017_RedMedOperationsCollageRehabilitationMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RetailNextMember" xlink:label="ck0001899017_RetailNextMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RocSkincareMember" xlink:label="ck0001899017_RocSkincareMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SaturnPurchaserCorpMember" xlink:label="ck0001899017_SaturnPurchaserCorpMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SauceCoHoldCoLLCMember" xlink:label="ck0001899017_SauceCoHoldCoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SensortowerMember" xlink:label="ck0001899017_SensortowerMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SimplicityMember" xlink:label="ck0001899017_SimplicityMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SolairusMember" xlink:label="ck0001899017_SolairusMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VesscoWaterMember" xlink:label="ck0001899017_VesscoWaterMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AdvancedAircrewAcademyLlcMember" xlink:label="ck0001899017_AdvancedAircrewAcademyLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AlertSRCNewcoMember" xlink:label="ck0001899017_AlertSRCNewcoMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AllbridgeLlcMember" xlink:label="ck0001899017_AllbridgeLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AllworthFinancialGroupLpMember" xlink:label="ck0001899017_AllworthFinancialGroupLpMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AMIBuyerIncMember" xlink:label="ck0001899017_AMIBuyerIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ApolloIntelligenceMember" xlink:label="ck0001899017_ApolloIntelligenceMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AviationTechnicalServicesIncMember" xlink:label="ck0001899017_AviationTechnicalServicesIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CityBarbequeLlcMember" xlink:label="ck0001899017_CityBarbequeLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ConcessionsDevelopmentGroupLLCMember" xlink:label="ck0001899017_ConcessionsDevelopmentGroupLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CorePowerYogaLLCMember" xlink:label="ck0001899017_CorePowerYogaLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CRHHealthcarePurchaserIncMember" xlink:label="ck0001899017_CRHHealthcarePurchaserIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ElectronicMerchantSystemsLlcMember" xlink:label="ck0001899017_ElectronicMerchantSystemsLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EraIndustriesLlcMember" xlink:label="ck0001899017_EraIndustriesLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FiestaHoldingsLLCMember" xlink:label="ck0001899017_FiestaHoldingsLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FoyleBidcoLimitedMember" xlink:label="ck0001899017_FoyleBidcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_GovineerSolutionsLLCMember" xlink:label="ck0001899017_GovineerSolutionsLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HeliosServicePartnersLLCMember" xlink:label="ck0001899017_HeliosServicePartnersLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_HlrsHoldcoLimitedMember" xlink:label="ck0001899017_HlrsHoldcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_JhccHoldingsLlcMember" xlink:label="ck0001899017_JhccHoldingsLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LagerboxMember" xlink:label="ck0001899017_LagerboxMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LogrhythmIncMember" xlink:label="ck0001899017_LogrhythmIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OrionMidcoLLCMember" xlink:label="ck0001899017_OrionMidcoLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PayRangeLLCMember" xlink:label="ck0001899017_PayRangeLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PBIGroupLLCMember" xlink:label="ck0001899017_PBIGroupLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PinnacleAcquisitionLLCMember" xlink:label="ck0001899017_PinnacleAcquisitionLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PMAParentHoldingsLLCMember" xlink:label="ck0001899017_PMAParentHoldingsLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RetailNextHoldingsIncMember" xlink:label="ck0001899017_RetailNextHoldingsIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RNEnterprisesLLCMember" xlink:label="ck0001899017_RNEnterprisesLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SpotlessBrandsLlcMember" xlink:label="ck0001899017_SpotlessBrandsLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SubstantialHoldcoLimitedMember" xlink:label="ck0001899017_SubstantialHoldcoLimitedMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SummerFridaysLLCMember" xlink:label="ck0001899017_SummerFridaysLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_TartanBidcoPtyLtdMember" xlink:label="ck0001899017_TartanBidcoPtyLtdMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VasaFitnessLLCMember" xlink:label="ck0001899017_VasaFitnessLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VaticaHealthIncMember" xlink:label="ck0001899017_VaticaHealthIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VacationRentalBrandsLlcMember" xlink:label="ck0001899017_VacationRentalBrandsLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VesscoMidcoHoldingsLlcMember" xlink:label="ck0001899017_VesscoMidcoHoldingsLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_VitalPurchaserLlcMember" xlink:label="ck0001899017_VitalPurchaserLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WealthEnhancementGroupWegMember" xlink:label="ck0001899017_WealthEnhancementGroupWegMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WSHPCottonwoodBuyerLLCMember" xlink:label="ck0001899017_WSHPCottonwoodBuyerLLCMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WPEFIXBidco23BVFkaKeystoneBidcoBVMember" xlink:label="ck0001899017_WPEFIXBidco23BVFkaKeystoneBidcoBVMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_WUHoldcoIncMember" xlink:label="ck0001899017_WUHoldcoIncMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ZeusFireSecurityMember" xlink:label="ck0001899017_ZeusFireSecurityMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_OtherCommitmentsLineItems" xlink:to="us-gaap_OtherCommitmentsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" xlink:to="srt_EquityMethodInvesteeNameDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_OtherCommitmentsLineItems" xlink:to="us-gaap_UnusedCommitmentsToExtendCredit" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ACAMSMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_OtherCommitmentsTable" xlink:to="srt_ScheduleOfEquityMethodInvestmentEquityMethodInvesteeNameAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_FinancialInstrumentAxis" xlink:to="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_FirstLienSeniorSecuredLoanMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AccidentCareAllianceHoldcoLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_OtherCommitmentsTable" xlink:to="us-gaap_FinancialInstrumentAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_RevolverCommitmentMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AdvancedAircrewMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_DelayedDrawCommitmentMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AegVisionMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_DelayedDrawCommitment1Member" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AeriTekGlobalCADAcquisitionIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_TransfersAndServicingOfFinancialInstrumentsTypesOfFinancialInstrumentsDomain" xlink:to="ck0001899017_DelayedDrawCommitment2Member" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AgrofreshSolutionsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AGSAmericanGlassServicesAcquisitionLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AllbridgeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AlldentHoldingGmbHMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AMIMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AOMInfusionMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ApprissMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AsprPacAcquisitionCoLlcMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="13" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AtsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="14" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AvalonBidcoLimitedMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="15" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AwaydayMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="16" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BeaconSpecializedLivingMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="17" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BlackbirdPurchaserIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="18" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BLIBuyerIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="19" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BridgerAerospaceGroupHoldingsIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="20" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_BtxPrecisionMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="21" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ChaseIndustriesIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="22" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ChexFinerFoodsLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="23" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ChiltonMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="24" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ChoreoMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="25" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_CityBbqMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="26" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_CubeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="27" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_DiscoverySeniorLivingMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="28" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_DtiqTechnologiesIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="29" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_DuracoMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="30" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_EasyIceLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="31" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_EasyIceMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="32" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_EheHealthMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="33" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ElectronicMerchantSystemsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="34" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ElevationNewCoLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="35" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_EngineeredProductsCoLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="36" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ETechGroupMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="37" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_EXTAcquisitionsIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="38" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_FactsGlobalEnergyMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="39" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_FiduciaireJean-MarcFaberFJMFMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="40" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_FiftyUSBidcoIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="41" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_G702BuyerIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="42" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_GalanthusGroupHoldingsLimitedMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="43" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_GovineerSolutionsFkaBlackMountainMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="44" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_HeadsUpTechnologiesIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="45" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_HellersMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="46" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_HempzMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="47" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_HumicAcquisitionHoldingsLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="48" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ICATLogisticsIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="49" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_KAMCHoldingsIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="50" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_LindstromLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="51" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_LogrhythmMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="52" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_MasterConcessionAirMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="53" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_MeteorUKBidcoLimitedMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="54" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_MonarchFincoLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="55" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_NafincoMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="56" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_NewMilaniGroupLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="57" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_OdysseyBehavioralHealthMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="58" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_OghBidcoLimitedMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="59" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_OwlAcquisitionLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="60" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PayRangeMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="61" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PcfMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="62" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PharmacyPartnersMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="63" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PlaskolitePPCIntermediateIILLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="64" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PMAMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="65" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PolloTropicalMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="66" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PPTGroupMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="67" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PrecisionConceptsParentIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="68" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PRGXMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="69" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PsychiatricMedicalCareLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="70" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PureWaferMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="71" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_R1RCMIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="72" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ReconomyMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="73" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_RedNucleusMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="74" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_RedMedOperationsCollageRehabilitationMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="75" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_RetailNextMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="76" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_RocSkincareMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="77" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SaturnPurchaserCorpMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="78" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SauceCoHoldCoLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="79" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SensortowerMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="80" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SimplicityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="81" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SolairusMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="82" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_VesscoWaterMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="83" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AdvancedAircrewAcademyLlcMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="84" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AlertSRCNewcoMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="85" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AllbridgeLlcMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="86" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AllworthFinancialGroupLpMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="87" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AMIBuyerIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="88" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ApolloIntelligenceMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="89" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_AviationTechnicalServicesIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="90" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_CityBarbequeLlcMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="91" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ConcessionsDevelopmentGroupLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="92" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_CorePowerYogaLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="93" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_CRHHealthcarePurchaserIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="94" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ElectronicMerchantSystemsLlcMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="95" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_EraIndustriesLlcMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="96" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_FiestaHoldingsLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="97" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_FoyleBidcoLimitedMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="98" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_GovineerSolutionsLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="99" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_HeliosServicePartnersLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="100" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_HlrsHoldcoLimitedMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="101" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_JhccHoldingsLlcMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="102" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_LagerboxMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="103" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_LogrhythmIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="104" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_OrionMidcoLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="105" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PayRangeLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="106" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PBIGroupLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="107" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PinnacleAcquisitionLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="108" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_PMAParentHoldingsLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="109" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_RetailNextHoldingsIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="110" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_RNEnterprisesLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="111" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SpotlessBrandsLlcMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="112" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SubstantialHoldcoLimitedMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="113" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_SummerFridaysLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="114" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_TartanBidcoPtyLtdMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="115" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_VasaFitnessLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="116" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_VaticaHealthIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="117" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_VacationRentalBrandsLlcMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="118" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_VesscoMidcoHoldingsLlcMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="119" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_VitalPurchaserLlcMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="120" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_WealthEnhancementGroupWegMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="121" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_WSHPCottonwoodBuyerLLCMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="122" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_WPEFIXBidco23BVFkaKeystoneBidcoBVMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="123" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_WUHoldcoIncMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="124" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_EquityMethodInvesteeNameDomain" xlink:to="ck0001899017_ZeusFireSecurityMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFinancialHighlightsScheduleOfFinancialHighlightsDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShareAbstract" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShareAbstract"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassISharesMember" xlink:label="ck0001899017_ClassISharesMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetAssetValuePerShare" xlink:label="us-gaap_NetAssetValuePerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:label="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDistributionToShareholdersPerShare" xlink:label="us-gaap_InvestmentCompanyDistributionToShareholdersPerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyTotalReturn" xlink:label="us-gaap_InvestmentCompanyTotalReturn"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SharesOutstanding" xlink:label="us-gaap_SharesOutstanding"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" xlink:label="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" xlink:label="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialRatiosAbstract" xlink:label="us-gaap_InvestmentCompanyFinancialRatiosAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AssetsNet" xlink:label="us-gaap_AssetsNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossRatio"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyExpenseRatioIncludingVoluntaryFeeWaiver" xlink:label="us-gaap_InvestmentCompanyExpenseRatioIncludingVoluntaryFeeWaiver"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyPortfolioTurnover" xlink:label="us-gaap_InvestmentCompanyPortfolioTurnover"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyFinancialHighlightsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShareAbstract" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:to="us-gaap_StatementClassOfStockAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassISharesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_NetAssetValuePerShare" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyDistributionToShareholdersPerShare" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyTotalReturn" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_SharesOutstanding" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_WeightedAverageNumberOfDilutedSharesOutstanding" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_WeightedAverageNumberOfSharesOutstandingBasic" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyFinancialRatiosAbstract" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_AssetsNet" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="13" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyInvestmentIncomeLossRatio" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="14" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyExpenseRatioIncludingVoluntaryFeeWaiver" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="15" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyPortfolioTurnover" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFinancialHighlightsScheduleOfFinancialHighlightsParentheticalDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:label="us-gaap_InvestmentCompanyFinancialHighlightsTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyExpenseRatioBeforeIncentiveAllocation" xlink:label="us-gaap_InvestmentCompanyExpenseRatioBeforeIncentiveAllocation"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassISharesMember" xlink:label="ck0001899017_ClassISharesMember"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyFinancialHighlightsTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsLineItems" xlink:to="us-gaap_InvestmentCompanyExpenseRatioBeforeIncentiveAllocation" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_InvestmentCompanyFinancialHighlightsTable" xlink:to="us-gaap_StatementClassOfStockAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassISharesMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureWarehousingTransactionDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:label="us-gaap_AccountsNotesAndLoansReceivableLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:label="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TypeOfArrangementAxis" xlink:label="us-gaap_TypeOfArrangementAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:label="us-gaap_ArrangementsAndNonarrangementTransactionsMember_default"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FacilityAgreementsMember" xlink:label="ck0001899017_FacilityAgreementsMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StatementScenarioAxis" xlink:label="srt_StatementScenarioAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ScenarioUnspecifiedDomain" xlink:label="srt_ScenarioUnspecifiedDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain" xlink:label="us-gaap_VariableRateDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_CounterpartyNameAxis" xlink:label="srt_CounterpartyNameAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_RepurchaseAgreementCounterpartyNameDomain" xlink:label="srt_RepurchaseAgreementCounterpartyNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateAxis" xlink:label="us-gaap_VariableRateAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForPeriodFromClosingDateToOneMonthAnniversaryOfClosingDateMember" xlink:label="ck0001899017_ForPeriodFromClosingDateToOneMonthAnniversaryOfClosingDateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtInstrumentFaceAmount" xlink:label="us-gaap_DebtInstrumentFaceAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FinancingProviderMember" xlink:label="ck0001899017_FinancingProviderMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForPeriodFromOneMonthAnniversaryOfClosingDateToTwoMonthAnniversaryOfClosingDateMember" xlink:label="ck0001899017_ForPeriodFromOneMonthAnniversaryOfClosingDateToTwoMonthAnniversaryOfClosingDateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PurchasePrice" xlink:label="ck0001899017_PurchasePrice"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForPeriodFromTwoMonthAnniversaryOfClosingDateToThreeMonthAnniversaryOfClosingDateMember" xlink:label="ck0001899017_ForPeriodFromTwoMonthAnniversaryOfClosingDateToThreeMonthAnniversaryOfClosingDateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DebtInvestmentAmountOfUnfundedRevolversDelayedDrawposition" xlink:label="ck0001899017_DebtInvestmentAmountOfUnfundedRevolversDelayedDrawposition"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ForPeriodFromThreeMonthAnniversaryOfClosingDateToFacilitiesEndDateMember" xlink:label="ck0001899017_ForPeriodFromThreeMonthAnniversaryOfClosingDateToFacilitiesEndDateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="us-gaap_UnrealizedGainLossOnInvestments"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OnOrAfterFacilitiesEndDateMember" xlink:label="ck0001899017_OnOrAfterFacilitiesEndDateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestReceivable" xlink:label="us-gaap_InterestReceivable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_NumberOfFacilityAgreements" xlink:label="ck0001899017_NumberOfFacilityAgreements"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MinimumSubscriptionsForForwardObligationToPurchasePortfolioInvestments" xlink:label="ck0001899017_MinimumSubscriptionsForForwardObligationToPurchasePortfolioInvestments"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_MaximumFinancingCommitmentAmount" xlink:label="ck0001899017_MaximumFinancingCommitmentAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DividerAmountToDetermineFee" xlink:label="ck0001899017_DividerAmountToDetermineFee"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" xlink:label="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfMinimumUtilizationFee" xlink:label="ck0001899017_PercentageOfMinimumUtilizationFee"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfMinimumUtilizationThreshold" xlink:label="ck0001899017_PercentageOfMinimumUtilizationThreshold"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentBasisSpreadVariableRate" xlink:label="us-gaap_InvestmentBasisSpreadVariableRate"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" xlink:label="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_TypeOfArrangementAxis" xlink:to="us-gaap_ArrangementsAndNonarrangementTransactionsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-default" xlink:from="us-gaap_TypeOfArrangementAxis" xlink:to="us-gaap_ArrangementsAndNonarrangementTransactionsMember_default" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ArrangementsAndNonarrangementTransactionsMember" xlink:to="ck0001899017_FacilityAgreementsMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_StatementScenarioAxis" xlink:to="srt_ScenarioUnspecifiedDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_VariableRateDomain" xlink:to="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="srt_CounterpartyNameAxis" xlink:to="srt_RepurchaseAgreementCounterpartyNameDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_VariableRateAxis" xlink:to="us-gaap_VariableRateDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="ck0001899017_ForPeriodFromClosingDateToOneMonthAnniversaryOfClosingDateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:to="us-gaap_TypeOfArrangementAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_DebtInstrumentFaceAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_RepurchaseAgreementCounterpartyNameDomain" xlink:to="ck0001899017_FinancingProviderMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="ck0001899017_ForPeriodFromOneMonthAnniversaryOfClosingDateToTwoMonthAnniversaryOfClosingDateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:to="us-gaap_VariableRateAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_PurchasePrice" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="ck0001899017_ForPeriodFromTwoMonthAnniversaryOfClosingDateToThreeMonthAnniversaryOfClosingDateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:to="srt_CounterpartyNameAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_DebtInvestmentAmountOfUnfundedRevolversDelayedDrawposition" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="ck0001899017_ForPeriodFromThreeMonthAnniversaryOfClosingDateToFacilitiesEndDateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_ScheduleOfAccountsNotesLoansAndFinancingReceivableTable" xlink:to="srt_StatementScenarioAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_UnrealizedGainLossOnInvestments" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_ScenarioUnspecifiedDomain" xlink:to="ck0001899017_OnOrAfterFacilitiesEndDateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_InterestReceivable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_NumberOfFacilityAgreements" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_MinimumSubscriptionsForForwardObligationToPurchasePortfolioInvestments" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_MaximumFinancingCommitmentAmount" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_DividerAmountToDetermineFee" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_LineOfCreditFacilityUnusedCapacityCommitmentFeePercentage" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="10" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_PercentageOfMinimumUtilizationFee" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="11" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="ck0001899017_PercentageOfMinimumUtilizationThreshold" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_InvestmentBasisSpreadVariableRate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="13" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_AccountsNotesAndLoansReceivableLineItems" xlink:to="us-gaap_InvestmentVariableInterestRateTypeExtensibleEnumeration" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureSubsequentEventsDetails">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventLineItems" xlink:label="us-gaap_SubsequentEventLineItems"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTable" xlink:label="us-gaap_SubsequentEventTable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockDividendsPerShareDeclared" xlink:label="us-gaap_CommonStockDividendsPerShareDeclared"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeDomain" xlink:label="us-gaap_SubsequentEventTypeDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventMember" xlink:label="us-gaap_SubsequentEventMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityAxis" xlink:label="us-gaap_CreditFacilityAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CreditFacilityDomain" xlink:label="us-gaap_CreditFacilityDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SmbcRevolvingCreditFacilityMember" xlink:label="ck0001899017_SmbcRevolvingCreditFacilityMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StatementClassOfStockAxis" xlink:label="us-gaap_StatementClassOfStockAxis"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ClassOfStockDomain" xlink:label="us-gaap_ClassOfStockDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SubsequentEventTypeAxis" xlink:label="us-gaap_SubsequentEventTypeAxis"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ClassISharesMember" xlink:label="ck0001899017_ClassISharesMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfShareRepurchases" xlink:label="ck0001899017_PercentageOfShareRepurchases"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_StockRepurchaseProgramExpirationDate" xlink:label="srt_StockRepurchaseProgramExpirationDate"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SharesValidlyTenderedForRepurchase" xlink:label="ck0001899017_SharesValidlyTenderedForRepurchase"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PercentageOfSharesValidlyTendered" xlink:label="ck0001899017_PercentageOfSharesValidlyTendered"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" xlink:label="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FourthAmendedAndRestatedDeclarationOfTrustTerm" xlink:label="ck0001899017_FourthAmendedAndRestatedDeclarationOfTrustTerm"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmendedAndRestatedBylawsDescription" xlink:label="ck0001899017_AmendedAndRestatedBylawsDescription"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesSubscriptions" xlink:label="us-gaap_CommonStockSharesSubscriptions"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockSharesIssued" xlink:label="us-gaap_CommonStockSharesIssued"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="true" xbrldt:contextElement="segment" xlink:arcrole="http://xbrl.org/int/dim/arcrole/all" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_SubsequentEventTable" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_CommonStockDividendsPerShareDeclared" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventTypeDomain" xlink:to="us-gaap_SubsequentEventMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_CreditFacilityAxis" xlink:to="us-gaap_CreditFacilityDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_CreditFacilityDomain" xlink:to="ck0001899017_SmbcRevolvingCreditFacilityMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_StatementClassOfStockAxis" xlink:to="us-gaap_ClassOfStockDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_SubsequentEventTypeAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/dimension-domain" xlink:from="us-gaap_SubsequentEventTypeAxis" xlink:to="us-gaap_SubsequentEventTypeDomain" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_ClassOfStockDomain" xlink:to="ck0001899017_ClassISharesMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="ck0001899017_PercentageOfShareRepurchases" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_StatementClassOfStockAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="srt_StockRepurchaseProgramExpirationDate" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="2" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/hypercube-dimension" xlink:from="us-gaap_SubsequentEventTable" xlink:to="us-gaap_CreditFacilityAxis" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="3" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="ck0001899017_SharesValidlyTenderedForRepurchase" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="ck0001899017_PercentageOfSharesValidlyTendered" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="5" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_LineOfCreditFacilityMaximumBorrowingCapacity" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="6" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="ck0001899017_FourthAmendedAndRestatedDeclarationOfTrustTerm" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="7" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="ck0001899017_AmendedAndRestatedBylawsDescription" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_CommonStockSharesSubscriptions" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="9" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_SubsequentEventLineItems" xlink:to="us-gaap_CommonStockSharesIssued" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://fasb.org/us-gaap/role/eedm/ExtensibleEnumerationLists">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_EquitySecuritiesIndustryMember" xlink:label="us-gaap_EquitySecuritiesIndustryMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireFinanceControlledAffiliateMember" xlink:label="ck0001899017_FireFinanceControlledAffiliateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FireFinanceMember" xlink:label="ck0001899017_FireFinanceMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncomeStatementAbstract" xlink:label="us-gaap_IncomeStatementAbstract"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_VariableRateDomain" xlink:label="us-gaap_VariableRateDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredOvernightFinancingRateSofrMember" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BankBillBenchmarkRateMember" xlink:label="ck0001899017_BankBillBenchmarkRateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EuroInterbankOfferedRateEuriborMember" xlink:label="ck0001899017_EuroInterbankOfferedRateEuriborMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_SterlingOvernightIndexAverageMember" xlink:label="ck0001899017_SterlingOvernightIndexAverageMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BankBillSwapBidRateMember" xlink:label="ck0001899017_BankBillSwapBidRateMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_BankBillSwapBidRateBBSYMember" xlink:label="ck0001899017_BankBillSwapBidRateBBSYMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_EuroInterbankOfferedRateMember" xlink:label="ck0001899017_EuroInterbankOfferedRateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember" xlink:label="us-gaap_SecuredOvernightFinancingRateSofrOvernightIndexSwapRateMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerNameDomain" xlink:label="us-gaap_InvestmentIssuerNameDomain"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_LegacyCorporateLendingHoldcoLlcMember" xlink:label="ck0001899017_LegacyCorporateLendingHoldcoLlcMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIssuerAffiliationDomain" xlink:label="us-gaap_InvestmentIssuerAffiliationDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" xlink:label="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentTypeCategorizationMember" xlink:label="us-gaap_InvestmentTypeCategorizationMember"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_FirstLienSeniorSecuredLoansMember" xlink:label="ck0001899017_FirstLienSeniorSecuredLoansMember"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_FireFinanceControlledAffiliateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_EquitySecuritiesIndustryMember" xlink:to="ck0001899017_FireFinanceMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_VariableRateDomain" xlink:to="ck0001899017_BankBillBenchmarkRateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_VariableRateDomain" xlink:to="ck0001899017_EuroInterbankOfferedRateEuriborMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="4" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_VariableRateDomain" xlink:to="ck0001899017_SterlingOvernightIndexAverageMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="8" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_VariableRateDomain" xlink:to="ck0001899017_BankBillSwapBidRateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="12" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_VariableRateDomain" xlink:to="ck0001899017_BankBillSwapBidRateBBSYMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="21" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_VariableRateDomain" xlink:to="ck0001899017_EuroInterbankOfferedRateMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerNameDomain" xlink:to="ck0001899017_LegacyCorporateLendingHoldcoLlcMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentIssuerAffiliationDomain" xlink:to="us-gaap_InvestmentAffiliatedIssuerNoncontrolledMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="us-gaap_InvestmentTypeCategorizationMember" xlink:to="ck0001899017_FirstLienSeniorSecuredLoansMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:definitionLink xlink:type="extended" xlink:role="http://fasb.org/srt/role/srt-eedm/ExtensibleEnumerationLists">
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:label="srt_TitleOfIndividualWithRelationshipToEntityDomain"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ChiefExecutiveOfficerMember" xlink:label="srt_ChiefExecutiveOfficerMember"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/srt/2025/elts/srt-2025.xsd#srt_ChiefFinancialOfficerMember" xlink:label="srt_ChiefFinancialOfficerMember"/>
          <link:definitionArc xlink:type="arc" order="0" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:to="srt_ChiefExecutiveOfficerMember" priority="2" use="optional"/>
          <link:definitionArc xlink:type="arc" order="1" xbrldt:closed="false" xlink:arcrole="http://xbrl.org/int/dim/arcrole/domain-member" xlink:from="srt_TitleOfIndividualWithRelationshipToEntityDomain" xlink:to="srt_ChiefFinancialOfficerMember" priority="2" use="optional"/>
        </link:definitionLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfAssetsAndLiabilities1">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_StockholdersEquity" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_CommonStockValue" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_LongTermDebt" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_InvestmentOwnedAtFairValue" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_Liabilities" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_AdditionalPaidInCapital" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_CommitmentsAndContingencies" order="2" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquity" xlink:to="us-gaap_RetainedEarningsAccumulatedDeficit" order="2" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_PayableInvestmentPurchase" order="2" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_RestrictedCashAndCashEquivalents" order="2" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_IncentiveFeePayableCapitalGainBased" order="3" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_HedgingAssetsCurrent" order="3" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_IncentiveFeePayableIncomeBased" order="5" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_CashHeldInForeignCurrency" order="5" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_DistributionPayable" order="6" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_DerivativeCollateralRightToReclaimCash" order="6" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_InterestPayableCurrentAndNoncurrent" order="7" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_AccruedLiabilitiesAndOtherLiabilities" order="8" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_ReceivableInvestmentSale" order="8" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_IncentiveFeePayable" order="9" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_InterestReceivable" order="9" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="ck0001899017_RepurchaseOfCommonSharesPayable" order="10" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_DividendsReceivable" order="10" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_DerivativeAssets" order="11" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_ManagementFeePayable" order="12" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_DerivativeLiabilities" order="13" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="ck0001899017_PrepaidFinancingCosts" order="15" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_DeferredFinanceCostsNet" order="16" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_PrepaidInsurance" order="18" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_OtherReceivables" order="19" weight="1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquity" xlink:label="us-gaap_StockholdersEquity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommonStockValue" xlink:label="us-gaap_CommonStockValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LongTermDebt" xlink:label="us-gaap_LongTermDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AdditionalPaidInCapital" xlink:label="us-gaap_AdditionalPaidInCapital"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CommitmentsAndContingencies" xlink:label="us-gaap_CommitmentsAndContingencies"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RetainedEarningsAccumulatedDeficit" xlink:label="us-gaap_RetainedEarningsAccumulatedDeficit"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PayableInvestmentPurchase" xlink:label="us-gaap_PayableInvestmentPurchase"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCashAndCashEquivalents" xlink:label="us-gaap_RestrictedCashAndCashEquivalents"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayableCapitalGainBased" xlink:label="us-gaap_IncentiveFeePayableCapitalGainBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_HedgingAssetsCurrent" xlink:label="us-gaap_HedgingAssetsCurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayableIncomeBased" xlink:label="us-gaap_IncentiveFeePayableIncomeBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashHeldInForeignCurrency" xlink:label="us-gaap_CashHeldInForeignCurrency"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionPayable" xlink:label="us-gaap_DistributionPayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeCollateralRightToReclaimCash" xlink:label="us-gaap_DerivativeCollateralRightToReclaimCash"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccruedLiabilitiesAndOtherLiabilities" xlink:label="us-gaap_AccruedLiabilitiesAndOtherLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ReceivableInvestmentSale" xlink:label="us-gaap_ReceivableInvestmentSale"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeePayable" xlink:label="us-gaap_IncentiveFeePayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestReceivable" xlink:label="us-gaap_InterestReceivable"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RepurchaseOfCommonSharesPayable" xlink:label="ck0001899017_RepurchaseOfCommonSharesPayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsReceivable" xlink:label="us-gaap_DividendsReceivable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssets" xlink:label="us-gaap_DerivativeAssets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementFeePayable" xlink:label="us-gaap_ManagementFeePayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeLiabilities" xlink:label="us-gaap_DerivativeLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_PrepaidFinancingCosts" xlink:label="ck0001899017_PrepaidFinancingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredFinanceCostsNet" xlink:label="us-gaap_DeferredFinanceCostsNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidInsurance" xlink:label="us-gaap_PrepaidInsurance"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherReceivables" xlink:label="us-gaap_OtherReceivables"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfOperations">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement" xlink:to="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" xlink:to="us-gaap_InterestExpense" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:to="us-gaap_RealizedInvestmentGainsLosses" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:to="us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" order="0" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetInvestmentIncome" xlink:to="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement" order="0" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_GrossInvestmentIncomeOperating" xlink:to="us-gaap_InterestIncomeOperatingPaidInCash" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" xlink:to="us-gaap_IncentiveFeeExpenseIncomeBased" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:to="us-gaap_ForeignCurrencyTransactionGainLossRealized" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:to="us-gaap_NetInvestmentIncome" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetInvestmentIncome" xlink:to="us-gaap_GrossInvestmentIncomeOperating" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_GrossInvestmentIncomeOperating" xlink:to="us-gaap_DividendIncomeOperatingPaidInCash" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement" xlink:to="us-gaap_InvestmentCompanyContractualFeeWaived" order="2" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" xlink:to="us-gaap_IncentiveFeeExpenseCapitalGainBased" order="2" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:to="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt" order="2" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_GrossInvestmentIncomeOperating" xlink:to="us-gaap_InterestAndDividendIncomeOperatingPaidInKind" order="2" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement" xlink:to="us-gaap_InvestmentCompanyVoluntaryFeeWaived" order="3" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:to="ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax" order="3" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_GrossInvestmentIncomeOperating" xlink:to="us-gaap_OtherIncome" order="3" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement" xlink:to="ck0001899017_InvestmentCompanyExpenseRecoupmentSupport" order="4" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" xlink:to="us-gaap_ManagementFeeExpense" order="4" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" xlink:to="us-gaap_TrusteeFees" order="5" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:to="us-gaap_GainLossOnSaleOfDerivatives" order="5" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" xlink:to="ck0001899017_OrganizationCosts" order="6" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:to="us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" order="6" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" xlink:to="us-gaap_AmortizationOfDeferredCharges" order="7" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" xlink:to="ck0001899017_ProfessionalFeesAndOperatingExpenses" order="8" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" xlink:to="us-gaap_OtherGeneralAndAdministrativeExpense" order="9" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives" order="9" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:to="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" order="10" weight="1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement" xlink:label="us-gaap_InvestmentCompanyExpenseAfterReductionOfFeeWaiverAndReimbursement"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" xlink:label="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:label="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="us-gaap_RealizedInvestmentGainsLosses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit" xlink:label="us-gaap_InvestmentIncomeOperatingTaxExpenseBenefit"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetInvestmentIncome" xlink:label="us-gaap_NetInvestmentIncome"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossInvestmentIncomeOperating" xlink:label="us-gaap_GrossInvestmentIncomeOperating"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestIncomeOperatingPaidInCash" xlink:label="us-gaap_InterestIncomeOperatingPaidInCash"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeeExpenseIncomeBased" xlink:label="us-gaap_IncentiveFeeExpenseIncomeBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossRealized" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossRealized"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendIncomeOperatingPaidInCash" xlink:label="us-gaap_DividendIncomeOperatingPaidInCash"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyContractualFeeWaived" xlink:label="us-gaap_InvestmentCompanyContractualFeeWaived"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncentiveFeeExpenseCapitalGainBased" xlink:label="us-gaap_IncentiveFeeExpenseCapitalGainBased"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt" xlink:label="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDividendIncomeOperatingPaidInKind" xlink:label="us-gaap_InterestAndDividendIncomeOperatingPaidInKind"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyVoluntaryFeeWaived" xlink:label="us-gaap_InvestmentCompanyVoluntaryFeeWaived"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax" xlink:label="ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherIncome" xlink:label="us-gaap_OtherIncome"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyExpenseRecoupmentSupport" xlink:label="ck0001899017_InvestmentCompanyExpenseRecoupmentSupport"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ManagementFeeExpense" xlink:label="us-gaap_ManagementFeeExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TrusteeFees" xlink:label="us-gaap_TrusteeFees"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSaleOfDerivatives" xlink:label="us-gaap_GainLossOnSaleOfDerivatives"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_OrganizationCosts" xlink:label="ck0001899017_OrganizationCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:label="us-gaap_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfDeferredCharges" xlink:label="us-gaap_AmortizationOfDeferredCharges"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ProfessionalFeesAndOperatingExpenses" xlink:label="ck0001899017_ProfessionalFeesAndOperatingExpenses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_OtherGeneralAndAdministrativeExpense" xlink:label="us-gaap_OtherGeneralAndAdministrativeExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" xlink:label="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfChangesInNetAssets">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction" xlink:to="us-gaap_StockIssuedDuringPeriodValueNewIssues" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyDividendDistribution" xlink:to="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquityPeriodIncreaseDecrease" xlink:to="us-gaap_NetIncomeLoss" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction" xlink:to="us-gaap_StockRepurchasedDuringPeriodValue" order="1" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingAfterTax" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquityPeriodIncreaseDecrease" xlink:to="us-gaap_InvestmentCompanyDividendDistribution" order="1" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction" xlink:to="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" order="2" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax" order="2" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_StockholdersEquityPeriodIncreaseDecrease" xlink:to="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction" order="2" weight="1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction" xlink:label="us-gaap_InvestmentCompanyIncreaseDecreaseFromShareTransaction"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueNewIssues" xlink:label="us-gaap_StockIssuedDuringPeriodValueNewIssues"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDividendDistribution" xlink:label="us-gaap_InvestmentCompanyDividendDistribution"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared" xlink:label="us-gaap_DistributionMadeToLimitedLiabilityCompanyLLCMemberCashDistributionsDeclared"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityPeriodIncreaseDecrease" xlink:label="us-gaap_StockholdersEquityPeriodIncreaseDecrease"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockRepurchasedDuringPeriodValue" xlink:label="us-gaap_StockRepurchasedDuringPeriodValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingAfterTax" xlink:label="us-gaap_RealizedGainLossInvestmentAndDerivativeOperatingAfterTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan" xlink:label="us-gaap_StockIssuedDuringPeriodValueDividendReinvestmentPlan"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax" xlink:label="us-gaap_UnrealizedGainLossInvestmentAndDerivativeOperatingAfterTax"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/StatementConsolidatedStatementsOfCashFlows">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_ProfitLoss" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:to="us-gaap_NetCashProvidedByUsedInOperatingActivities" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_ProceedsFromIssuanceOfLongTermDebt" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity" order="1" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:to="us-gaap_NetCashProvidedByUsedInFinancingActivities" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="ck0001899017_CashAndCashEquivalentsHeldInForeignCurrency" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_RepaymentsOfLongTermDebt" order="1" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity" order="2" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_PaymentsOfFinancingCosts" order="2" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInReceivableForInvestmentSold" order="3" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_PaymentsOfStockIssuanceCosts" order="3" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_AmortizationOfDebtDiscountPremium" order="4" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:to="us-gaap_RestrictedCash" order="4" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_AmortizationOfFinancingCosts" order="5" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_PaymentsForRepurchaseOfCommonStock" order="5" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_AmortizationOfDeferredCharges" order="6" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_ProceedsFromIssuanceOfCommonStock" order="6" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_RealizedInvestmentGainsLosses" order="7" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:to="us-gaap_PaymentsOfDividends" order="7" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_ForeignCurrencyTransactionGainLossRealized" order="8" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt" order="9" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" order="10" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_ForeignCurrencyTransactionGainLossUnrealizedExcludingInvestmentPriceChangeBeforeTax" order="11" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeUnrealizedGainLossOperatingBeforeTax" order="12" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives" order="13" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInDerivativeAssets" order="14" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" order="15" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInDividendsReceivable" order="16" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInTradingLiabilities" order="18" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInPrepaidInsurance" order="19" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="ck0001899017_IncreaseDecreaseInPrepaidFinancingCosts" order="20" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInOtherReceivables" order="21" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInDueToAffiliates" order="22" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased" order="23" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased" order="24" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInInterestPayableNet" order="25" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities" order="26" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:to="us-gaap_IncreaseDecreaseInManagementFeePayable" order="33" weight="1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInOperatingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInOperatingActivities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProfitLoss" xlink:label="us-gaap_ProfitLoss"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseExcludingExchangeRateEffect"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents" xlink:label="us-gaap_CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetCashProvidedByUsedInFinancingActivities" xlink:label="us-gaap_NetCashProvidedByUsedInFinancingActivities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfLongTermDebt" xlink:label="us-gaap_ProceedsFromIssuanceOfLongTermDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity" xlink:label="us-gaap_PaymentsForPurchaseOfInvestmentOperatingActivity"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_CashAndCashEquivalentsHeldInForeignCurrency" xlink:label="ck0001899017_CashAndCashEquivalentsHeldInForeignCurrency"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RepaymentsOfLongTermDebt" xlink:label="us-gaap_RepaymentsOfLongTermDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity" xlink:label="us-gaap_ProceedsFromDispositionOfInvestmentOperatingActivity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfFinancingCosts" xlink:label="us-gaap_PaymentsOfFinancingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInReceivableForInvestmentSold" xlink:label="us-gaap_IncreaseDecreaseInReceivableForInvestmentSold"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfStockIssuanceCosts" xlink:label="us-gaap_PaymentsOfStockIssuanceCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfDebtDiscountPremium" xlink:label="us-gaap_AmortizationOfDebtDiscountPremium"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RestrictedCash" xlink:label="us-gaap_RestrictedCash"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfFinancingCosts" xlink:label="us-gaap_AmortizationOfFinancingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsForRepurchaseOfCommonStock" xlink:label="us-gaap_PaymentsForRepurchaseOfCommonStock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AmortizationOfDeferredCharges" xlink:label="us-gaap_AmortizationOfDeferredCharges"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ProceedsFromIssuanceOfCommonStock" xlink:label="us-gaap_ProceedsFromIssuanceOfCommonStock"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="us-gaap_RealizedInvestmentGainsLosses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PaymentsOfDividends" xlink:label="us-gaap_PaymentsOfDividends"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossRealized" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossRealized"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt" xlink:label="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss" xlink:label="us-gaap_DebtAndEquitySecuritiesUnrealizedGainLoss"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_ForeignCurrencyTransactionGainLossUnrealizedExcludingInvestmentPriceChangeBeforeTax" xlink:label="us-gaap_ForeignCurrencyTransactionGainLossUnrealizedExcludingInvestmentPriceChangeBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeUnrealizedGainLossOperatingBeforeTax" xlink:label="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeUnrealizedGainLossOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDerivativeAssets" xlink:label="us-gaap_IncreaseDecreaseInDerivativeAssets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet" xlink:label="us-gaap_IncreaseDecreaseInAccruedInterestReceivableNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDividendsReceivable" xlink:label="us-gaap_IncreaseDecreaseInDividendsReceivable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInTradingLiabilities" xlink:label="us-gaap_IncreaseDecreaseInTradingLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInPrepaidInsurance" xlink:label="us-gaap_IncreaseDecreaseInPrepaidInsurance"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_IncreaseDecreaseInPrepaidFinancingCosts" xlink:label="ck0001899017_IncreaseDecreaseInPrepaidFinancingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInOtherReceivables" xlink:label="us-gaap_IncreaseDecreaseInOtherReceivables"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInDueToAffiliates" xlink:label="us-gaap_IncreaseDecreaseInDueToAffiliates"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased" xlink:label="us-gaap_IncreaseDecreaseInIncentiveFeePayableIncomeBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased" xlink:label="us-gaap_IncreaseDecreaseInIncentiveFeePayableCapitalGainBased"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInInterestPayableNet" xlink:label="us-gaap_IncreaseDecreaseInInterestPayableNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities" xlink:label="us-gaap_IncreaseDecreaseInAccruedLiabilitiesAndOtherOperatingLiabilities"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_IncreaseDecreaseInManagementFeePayable" xlink:label="us-gaap_IncreaseDecreaseInManagementFeePayable"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIiBalanceSheetDetails">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_DeferredOfferingCosts" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_LiabilitiesAndStockholdersEquity" xlink:to="us-gaap_Liabilities" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_PrepaidExpenseCurrent" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_InterestPayableCurrentAndNoncurrent" order="2" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_CashAndCashEquivalentsAtCarryingValue" order="2" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_DividendsPayableCurrentAndNoncurrent" order="3" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_InterestReceivable" order="3" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_LineOfCredit" order="4" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Assets" xlink:to="us-gaap_InvestmentOwnedAtFairValue" order="4" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_NotesPayable" order="5" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_Liabilities" xlink:to="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" order="7" weight="1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LiabilitiesAndStockholdersEquity" xlink:label="us-gaap_LiabilitiesAndStockholdersEquity"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest" xlink:label="us-gaap_StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Assets" xlink:label="us-gaap_Assets"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DeferredOfferingCosts" xlink:label="us-gaap_DeferredOfferingCosts"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_Liabilities" xlink:label="us-gaap_Liabilities"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers" xlink:label="ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_PrepaidExpenseCurrent" xlink:label="us-gaap_PrepaidExpenseCurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestPayableCurrentAndNoncurrent" xlink:label="us-gaap_InterestPayableCurrentAndNoncurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_CashAndCashEquivalentsAtCarryingValue" xlink:label="us-gaap_CashAndCashEquivalentsAtCarryingValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DividendsPayableCurrentAndNoncurrent" xlink:label="us-gaap_DividendsPayableCurrentAndNoncurrent"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestReceivable" xlink:label="us-gaap_InterestReceivable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCredit" xlink:label="us-gaap_LineOfCredit"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentOwnedAtFairValue" xlink:label="us-gaap_InvestmentOwnedAtFairValue"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NotesPayable" xlink:label="us-gaap_NotesPayable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent" xlink:label="us-gaap_AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureInvestmentsSlpIiStatementOfOperationsDetails">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentIncomeInvestmentExpense" xlink:to="us-gaap_InterestExpense" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:to="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeRealizedGainLossOperatingBeforeTax" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:to="us-gaap_GrossInvestmentIncomeOperating" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_GrossInvestmentIncomeOperating" xlink:to="us-gaap_InvestmentIncomeInterest" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentIncomeInvestmentExpense" xlink:to="ck0001899017_ProfessionalFeesAndOtherExpenses" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:to="us-gaap_UnrealizedGainLossOnInvestments" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:to="us-gaap_InvestmentIncomeInvestmentExpense" order="1" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_NetIncomeLoss" xlink:to="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" order="1" weight="1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInvestmentExpense" xlink:label="us-gaap_InvestmentIncomeInvestmentExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpense" xlink:label="us-gaap_InterestExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax" xlink:label="us-gaap_RealizedAndUnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTransactionPriceChangeOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeRealizedGainLossOperatingBeforeTax" xlink:label="us-gaap_DebtAndEquitySecuritiesAndForeignCurrencyTransactionPriceChangeRealizedGainLossOperatingBeforeTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax" xlink:label="us-gaap_InvestmentIncomeOperatingAfterExpenseAndTax"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GrossInvestmentIncomeOperating" xlink:label="us-gaap_GrossInvestmentIncomeOperating"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentIncomeInterest" xlink:label="us-gaap_InvestmentIncomeInterest"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_ProfessionalFeesAndOtherExpenses" xlink:label="ck0001899017_ProfessionalFeesAndOtherExpenses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnInvestments" xlink:label="us-gaap_UnrealizedGainLossOnInvestments"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnGoldmanSachsRevolvingCreditFacilityDetails">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InterestAndDebtExpense" xlink:to="us-gaap_InterestExpenseDebt" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InterestAndDebtExpense" xlink:to="us-gaap_LineOfCreditFacilityCommitmentFeeAmount" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InterestAndDebtExpense" xlink:to="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" order="2" weight="1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDebtExpense" xlink:label="us-gaap_InterestAndDebtExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt" xlink:label="us-gaap_InterestExpenseDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeeAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnJpmRevolvingCreditFacilityDetails">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InterestAndDebtExpense" xlink:to="us-gaap_InterestExpenseDebt" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InterestAndDebtExpense" xlink:to="us-gaap_LineOfCreditFacilityCommitmentFeeAmount" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InterestAndDebtExpense" xlink:to="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" order="2" weight="1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDebtExpense" xlink:label="us-gaap_InterestAndDebtExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt" xlink:label="us-gaap_InterestExpenseDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeeAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnSmbcRevolvingCreditFacilityDetails">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InterestAndDebtExpense" xlink:to="us-gaap_InterestExpenseDebt" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InterestAndDebtExpense" xlink:to="us-gaap_LineOfCreditFacilityCommitmentFeeAmount" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InterestAndDebtExpense" xlink:to="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" order="2" weight="1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDebtExpense" xlink:label="us-gaap_InterestAndDebtExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt" xlink:label="us-gaap_InterestExpenseDebt"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_LineOfCreditFacilityCommitmentFeeAmount" xlink:label="us-gaap_LineOfCreditFacilityCommitmentFeeAmount"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDebtInterestExpenseOnSeries2025SeniorNotesDetails">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InterestAndDebtExpense" xlink:to="us-gaap_InterestExpenseDebt" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InterestAndDebtExpense" xlink:to="ck0001899017_DebtInstrumentInterestRateSwaps" order="2" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InterestAndDebtExpense" xlink:to="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" order="3" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InterestAndDebtExpense" xlink:to="ck0001899017_InterestExpenseRelatedToHedgedItems" order="4" weight="1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestAndDebtExpense" xlink:label="us-gaap_InterestAndDebtExpense"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InterestExpenseDebt" xlink:label="us-gaap_InterestExpenseDebt"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_DebtInstrumentInterestRateSwaps" xlink:label="ck0001899017_DebtInstrumentInterestRateSwaps"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" xlink:label="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InterestExpenseRelatedToHedgedItems" xlink:label="ck0001899017_InterestExpenseRelatedToHedgedItems"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesOffsetOfAssetsAndLiabilitiesDetails">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" xlink:to="us-gaap_DerivativeFairValueOfDerivativeAsset" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral" xlink:to="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" xlink:to="us-gaap_DerivativeFairValueOfDerivativeLiability" order="1" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral" xlink:to="us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset" order="1" weight="-1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountNotOffsetAgainstCollateral"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAsset" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAsset"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral" xlink:label="us-gaap_DerivativeFairValueOfDerivativeAssetAmountOffsetAgainstCollateral"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeFairValueOfDerivativeLiability" xlink:label="us-gaap_DerivativeFairValueOfDerivativeLiability"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset" xlink:label="us-gaap_DerivativeAssetCollateralObligationToReturnCashOffset"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureDerivativesEffectOfTransactionsInDerivativeInstrumentsDetails">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_GainLossOnSaleOfDerivatives" xlink:to="us-gaap_RealizedInvestmentGainsLosses" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_GainLossOnSaleOfDerivatives" xlink:to="us-gaap_UnrealizedGainLossOnDerivatives" order="2" weight="1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_GainLossOnSaleOfDerivatives" xlink:label="us-gaap_GainLossOnSaleOfDerivatives"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_RealizedInvestmentGainsLosses" xlink:label="us-gaap_RealizedInvestmentGainsLosses"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_UnrealizedGainLossOnDerivatives" xlink:label="us-gaap_UnrealizedGainLossOnDerivatives"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxScheduleOfTaxCharacterOfDistributionsDetails">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyDividendDistribution" xlink:to="us-gaap_InvestmentCompanyDistributionOrdinaryIncome" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyDividendDistribution" xlink:to="us-gaap_InvestmentCompanyDistributionLongTermCapitalGain" order="1" weight="1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDividendDistribution" xlink:label="us-gaap_InvestmentCompanyDividendDistribution"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDistributionOrdinaryIncome" xlink:label="us-gaap_InvestmentCompanyDistributionOrdinaryIncome"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyDistributionLongTermCapitalGain" xlink:label="us-gaap_InvestmentCompanyDistributionLongTermCapitalGain"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxScheduleOfReconcilesNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeDetails">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyTaxBasisIncomeTaxable" xlink:to="us-gaap_NetIncomeLoss" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyTaxBasisIncomeTaxable" xlink:to="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation" order="1" weight="-1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyTaxBasisIncomeTaxable" xlink:to="us-gaap_InvestmentCompanyTaxBasisExpenseNotDeductible" order="2" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyTaxBasisIncomeTaxable" xlink:to="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit" order="3" weight="-1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyTaxBasisIncomeTaxable" xlink:label="us-gaap_InvestmentCompanyTaxBasisIncomeTaxable"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_NetIncomeLoss" xlink:label="us-gaap_NetIncomeLoss"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation" xlink:label="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyTaxBasisExpenseNotDeductible" xlink:label="us-gaap_InvestmentCompanyTaxBasisExpenseNotDeductible"/>
          <link:loc xlink:type="locator" xlink:href="ck0001899017-20251231.xsd#ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit" xlink:label="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureIncomeTaxScheduleOfAggregateUnrealizedAppreciationAndDepreciationOnInvestmentsAndForwardCurrencyExchangeContractsBasedOnCostFor">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:to="us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:to="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" order="1" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:to="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation" order="2" weight="-1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet" xlink:label="us-gaap_TaxBasisOfInvestmentsUnrealizedAppreciationDepreciationNet"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes" xlink:label="us-gaap_TaxBasisOfInvestmentsCostForIncomeTaxPurposes"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation" xlink:label="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedAppreciation"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation" xlink:label="us-gaap_TaxBasisOfInvestmentsGrossUnrealizedDepreciation"/>
        </link:calculationLink>
        <link:calculationLink xlink:type="extended" xlink:role="http://www.baincapital.com/20251231/taxonomy/role/DisclosureFinancialHighlightsScheduleOfFinancialHighlightsDetails">
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare" xlink:to="us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare" order="0" weight="1" use="optional"/>
          <link:calculationArc xlink:type="arc" xlink:arcrole="https://xbrl.org/2023/arcrole/summation-item" xlink:from="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare" xlink:to="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" order="1" weight="1" use="optional"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossFromOperationsPerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare" xlink:label="us-gaap_InvestmentCompanyInvestmentIncomeLossPerShare"/>
          <link:loc xlink:type="locator" xlink:href="https://xbrl.fasb.org/us-gaap/2025/elts/us-gaap-2025.xsd#us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare" xlink:label="us-gaap_InvestmentCompanyGainLossOnInvestmentPerShare"/>
        </link:calculationLink>
      </link:linkbase>
    </xsd:appinfo>
  </xsd:annotation>
  <xsd:element id="ck0001899017_FoyleBidcoLimitedMember" name="FoyleBidcoLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheAMember" name="TwoThousandTwentyFiveSeniorNotesTrancheAMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_HellersMember" name="HellersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ForPeriodFromOneMonthAnniversaryOfClosingDateToTwoMonthAnniversaryOfClosingDateMember" name="ForPeriodFromOneMonthAnniversaryOfClosingDateToTwoMonthAnniversaryOfClosingDateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ProfessionalFeesAndOperatingExpensesPolicyTextBlock" name="ProfessionalFeesAndOperatingExpensesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_BainCapitalSeniorLoanProgramIILLCPreferredEquityInterestInvestmentVehiclesMember" name="BainCapitalSeniorLoanProgramIILLCPreferredEquityInterestInvestmentVehiclesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InterestRateFloorFourMember" name="InterestRateFloorFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_LagerboxMember" name="LagerboxMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_NetAssetAndLiabilitiesPerShare" name="NetAssetAndLiabilitiesPerShare" type="dtr-types:perShareItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_TotalSeniorSecuritiesMember" name="TotalSeniorSecuritiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InvestmentOnVehiclesMember" name="InvestmentOnVehiclesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PBIGroupLLCMember" name="PBIGroupLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_OfferingCostsPolicyTextBlock" name="OfferingCostsPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_AwaydayMember" name="AwaydayMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FirstLienSeniorSecuredLoansMember" name="FirstLienSeniorSecuredLoansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_DelayedDrawCommitment2Member" name="DelayedDrawCommitment2Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PreIncentiveFeeNetInvestmentIncomeLessThanOrEqualToCatchUpAmountMember" name="PreIncentiveFeeNetInvestmentIncomeLessThanOrEqualToCatchUpAmountMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_EraIndustriesLlcMember" name="EraIndustriesLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_EnduranceHoldcoLimitedMember" name="EnduranceHoldcoLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InterestPayableOnSubordinatedNotesPayableToMembers" name="InterestPayableOnSubordinatedNotesPayableToMembers" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_SharesValidlyTenderedForRepurchase" name="SharesValidlyTenderedForRepurchase" type="xbrli:sharesItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_RelatedPartyTransactionShareholderServicingAndDistributionFeesPercentage" name="RelatedPartyTransactionShareholderServicingAndDistributionFeesPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_GovineerSolutionsFkaBlackMountainMember" name="GovineerSolutionsFkaBlackMountainMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ReimbursementPercentageOfOtherOperatingExpenses" name="ReimbursementPercentageOfOtherOperatingExpenses" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveOneMember" name="TwentySixSeptemberTwoThousandAndTwentyFiveOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InterestRateFloorEightMember" name="InterestRateFloorEightMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_CommonClassDMember" name="CommonClassDMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ScheduleOfShareholderServicingAndOrDistributionFeeTableTextBlock" name="ScheduleOfShareholderServicingAndOrDistributionFeeTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_VesscoMidcoHoldingsLlcMember" name="VesscoMidcoHoldingsLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FacilitiesMember" name="FacilitiesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ClassISharesMember" name="ClassISharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AeriTekGlobalCADAcquisitionIncMember" name="AeriTekGlobalCADAcquisitionIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ConcessionsDevelopmentGroupLLCMember" name="ConcessionsDevelopmentGroupLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SubordinatedDebtSpreadVariableRate" name="SubordinatedDebtSpreadVariableRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_TrancheANotesMember" name="TrancheANotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InvestmentUnfundedCommitments" name="InvestmentUnfundedCommitments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_AegVisionMember" name="AegVisionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RepurchaseRequestDeadlineOnMarchThreeTwoThousandTwentyFiveMember" name="RepurchaseRequestDeadlineOnMarchThreeTwoThousandTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveOneMember" name="TwentyFiveJuneTwoThousandAndTwentyFiveOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ServicesConsumerMember" name="ServicesConsumerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InvestmentOwnedAtCostAndCashEquivalentsCarryingValue" name="InvestmentOwnedAtCostAndCashEquivalentsCarryingValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_SikichMember" name="SikichMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RisksRelatingToOurBusinessAndStructureMember" name="RisksRelatingToOurBusinessAndStructureMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FiveLargestInvesteeMember" name="FiveLargestInvesteeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_BtxPrecisionMember" name="BtxPrecisionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_OrionMidcoLLCMember" name="OrionMidcoLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AdvancedAircrewMember" name="AdvancedAircrewMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SubordinatedNoteInInvestmentVehiclesMember" name="SubordinatedNoteInInvestmentVehiclesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RetailNextHoldingsIncMember" name="RetailNextHoldingsIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_BankBillSwapBidRateBBSYMember" name="BankBillSwapBidRateBBSYMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ScheduleOfTaxableDistributionsTableTextBlock" name="ScheduleOfTaxableDistributionsTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_RepurchaseOfCommonSharesPayable" name="RepurchaseOfCommonSharesPayable" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_BCCCPKInvestments2LPEquityInterestMember" name="BCCCPKInvestments2LPEquityInterestMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_WarehousingTransactionAbstract" name="WarehousingTransactionAbstract" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InvestmentVehiclesMember" name="InvestmentVehiclesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_UtilitiesElectricMember" name="UtilitiesElectricMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SimplicityMember" name="SimplicityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AMIMember" name="AMIMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_EasyIceMember" name="EasyIceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_BcsfAdvisorsLpMember" name="BcsfAdvisorsLpMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RepurchaseRequestDeadlineOnJuneTwoTwoThousandTwentyFiveMember" name="RepurchaseRequestDeadlineOnJuneTwoTwoThousandTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_BeaconSpecializedLivingMember" name="BeaconSpecializedLivingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ACAMSMember" name="ACAMSMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_VaticaHealthIncMember" name="VaticaHealthIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ConsumerGoodsNonDurableSectorMember" name="ConsumerGoodsNonDurableSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveMember" name="TwentyNineDecemberTwoThousandTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AmountOfExpenseSupportMember" name="AmountOfExpenseSupportMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_GaapIncentiveFeeMember" name="GaapIncentiveFeeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentyNineFebruaryTwoThousandAndTwentyFourMember" name="TwentyNineFebruaryTwoThousandAndTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ProfessionalFeesAndOtherExpenses" name="ProfessionalFeesAndOtherExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_FiduciaireJean-MarcFaberFJMFMember" name="FiduciaireJean-MarcFaberFJMFMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AllbridgeLlcMember" name="AllbridgeLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_CreditAdjustmentSpreadMember" name="CreditAdjustmentSpreadMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SmbcRevolvingCreditFacilityMember" name="SmbcRevolvingCreditFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FireInsuranceMember" name="FireInsuranceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InterestRateFloorTwoMember" name="InterestRateFloorTwoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_KAMCHoldingsIncMember" name="KAMCHoldingsIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ChartbeatMember" name="ChartbeatMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_IncentiveFeesVoluntarilyWaived" name="IncentiveFeesVoluntarilyWaived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_Series2025SeniorNotesMember" name="Series2025SeniorNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AgrofreshSolutionsMember" name="AgrofreshSolutionsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RetailNextMember" name="RetailNextMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ScheduleOfInvestmentByIndustryTableTextBlock" name="ScheduleOfInvestmentByIndustryTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_ElectronicMerchantSystemsMember" name="ElectronicMerchantSystemsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_OghBidcoLimitedMember" name="OghBidcoLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentyFiveJuneTwoThousandAndTwentyFiveMember" name="TwentyFiveJuneTwoThousandAndTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_DividerAmountToDetermineFee" name="DividerAmountToDetermineFee" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_TelecommunicationsMember" name="TelecommunicationsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PsychiatricMedicalCareLLCMember" name="PsychiatricMedicalCareLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SoftcoMember" name="SoftcoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_LogrhythmIncMember" name="LogrhythmIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PercentageOfUnderwiringCompensationOnGrossProceedsOfPrimaryOffering" name="PercentageOfUnderwiringCompensationOnGrossProceedsOfPrimaryOffering" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_MediaDiversifiedAndProductionMember" name="MediaDiversifiedAndProductionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentyNineJanuaryTwoThousandAndTwentyFiveMember" name="TwentyNineJanuaryTwoThousandAndTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_BankBillSwapBidRateMember" name="BankBillSwapBidRateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_MinimumSubscriptionsForForwardObligationToPurchasePortfolioInvestments" name="MinimumSubscriptionsForForwardObligationToPurchasePortfolioInvestments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_BainCapitalSeniorLoanProgramLlcMember" name="BainCapitalSeniorLoanProgramLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_EuroInterbankOfferedRateMember" name="EuroInterbankOfferedRateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_WarehousingTransactionTextBlock" name="WarehousingTransactionTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" name="InvestmentCompanyExpenseBeforeFeeWaiverAndReimbursement" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_BcpcProjectAberdeenLlcMember" name="BcpcProjectAberdeenLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_CashEquivalentsInterestRate" name="CashEquivalentsInterestRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_MasterConcessionAirMember" name="MasterConcessionAirMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PMAMember" name="PMAMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_BainCapitalSeniorLoanProgramIILLCMember" name="BainCapitalSeniorLoanProgramIILLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AGSAmericanGlassServicesAcquisitionLLCMember" name="AGSAmericanGlassServicesAcquisitionLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_BainCapitalSeniorLoanProgramIILLCSubordinatedNoteInvestmentVehiclesMember" name="BainCapitalSeniorLoanProgramIILLCSubordinatedNoteInvestmentVehiclesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FederalIncomeTaxAndOtherTaxRisksMember" name="FederalIncomeTaxAndOtherTaxRisksMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RepurchaseRequestDeadlineOnDecemberTenTwoThousandTwentyFiveMember" name="RepurchaseRequestDeadlineOnDecemberTenTwoThousandTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ChiltonMember" name="ChiltonMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PcfMember" name="PcfMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PreIncentiveFeeNetInvestmentIncomeEqualToLessThanCatchUpAmountMember" name="PreIncentiveFeeNetInvestmentIncomeEqualToLessThanCatchUpAmountMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FireFinanceSectorMember" name="FireFinanceSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeMember" name="ThirtyNovemberTwoThousandAndTwentyThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ConstructionBuildingMember" name="ConstructionBuildingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_EURIBORPlusSixPointTwoFivePercentageMember" name="EURIBORPlusSixPointTwoFivePercentageMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SolairusMember" name="SolairusMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_VesscoWaterMember" name="VesscoWaterMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_CorePowerYogaLLCMember" name="CorePowerYogaLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_JhccHoldingsLlcMember" name="JhccHoldingsLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_MediaAdvertisingPrintingAndPublishingMember" name="MediaAdvertisingPrintingAndPublishingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentyNineDecemberTwoThousandTwentyThreeMember" name="TwentyNineDecemberTwoThousandTwentyThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_EquityInterestsInInvestmentVehiclesMember" name="EquityInterestsInInvestmentVehiclesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SONIAPlusSixPointThreeEightPercentageMember" name="SONIAPlusSixPointThreeEightPercentageMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfPrecedingCalendarQuarters" name="PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfPrecedingCalendarQuarters" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_RepurchaseRequestDeadlineOnAugustTwentyNineTwoThousandTwentyFiveMember" name="RepurchaseRequestDeadlineOnAugustTwentyNineTwoThousandTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_R1RCMIncMember" name="R1RCMIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_WellsFargoMember" name="WellsFargoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ServicesBusinessMember" name="ServicesBusinessMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PMAParentHoldingsLLCMember" name="PMAParentHoldingsLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PreferredEquityInterestInInvestmentVehiclesMember" name="PreferredEquityInterestInInvestmentVehiclesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InterestExpenseRelatedToHedgedItems" name="InterestExpenseRelatedToHedgedItems" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_PayRangeMember" name="PayRangeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_JanuaryThirtyFirstTwoThousandTwentyFourMember" name="JanuaryThirtyFirstTwoThousandTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AMIBuyerIncMember" name="AMIBuyerIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_MMCLOWH1CreditFacilityMember" name="MMCLOWH1CreditFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SubordinatedDebtBasisSpreadVariableRate" name="SubordinatedDebtBasisSpreadVariableRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_MeteorUKBidcoLimitedMember" name="MeteorUKBidcoLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_OdysseyBehavioralHealthMember" name="OdysseyBehavioralHealthMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_DtiqTechnologiesIncMember" name="DtiqTechnologiesIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember" name="GoldmanSachsFinancialSquareGovernmentFundInstitutionalShareClassMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_LegacyCorporateLendingHoldcoLlcClassACommonEquityMember" name="LegacyCorporateLendingHoldcoLlcClassACommonEquityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFiveMember" name="TwentySixSeptemberTwoThousandAndTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SauceCoHoldCoLLCMember" name="SauceCoHoldCoLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_CatchUpAmountPercentMultipliedToNav" name="CatchUpAmountPercentMultipliedToNav" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_PreferredEquityInterestRate" name="PreferredEquityInterestRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_BNPParibasMember" name="BNPParibasMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_StockRepurchasedDuringPeriodIncludingEarlyRepurchaseDeduction" name="StockRepurchasedDuringPeriodIncludingEarlyRepurchaseDeduction" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_ApprissMember" name="ApprissMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FiftyUSBidcoIncMember" name="FiftyUSBidcoIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentyEightMayTwoThousandAndTwentyFiveMember" name="TwentyEightMayTwoThousandAndTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_IncreaseDecreaseInPrepaidFinancingCosts" name="IncreaseDecreaseInPrepaidFinancingCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLossSubsidiary" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInOtherComprehensiveIncomeLossSubsidiary" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_ReconomyMember" name="ReconomyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_GoldmanSachsRevolvingCreditFacilityMember" name="GoldmanSachsRevolvingCreditFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPaidInKindInterest" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisPaidInKindInterest" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_HumicAcquisitionHoldingsLLCMember" name="HumicAcquisitionHoldingsLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SeventeenMarchTwoThousandAndTwentyFiveMember" name="SeventeenMarchTwoThousandAndTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentyNineMarchTwoThousandAndTwentyFourMember" name="TwentyNineMarchTwoThousandAndTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourOneMember" name="TwentyThirdDecemberTwoThousandTwentyFourOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_MaximumEstimatedManagingDealerFee" name="MaximumEstimatedManagingDealerFee" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_SummaryOfAllExpensesSupportedAndRecoupedByTheAdviserTableTextBlock" name="SummaryOfAllExpensesSupportedAndRecoupedByTheAdviserTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_DerivativeInstrumentAverageNotionalAmount" name="DerivativeInstrumentAverageNotionalAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_CityBbqMember" name="CityBbqMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_LineOfCreditFacilityCurrentBorrowingCapacityRegardingProvisionToPermitIncreasesOfTermAndRevolvingCommitments" name="LineOfCreditFacilityCurrentBorrowingCapacityRegardingProvisionToPermitIncreasesOfTermAndRevolvingCommitments" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_DelayedDrawCommitmentMember" name="DelayedDrawCommitmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_WSHPCottonwoodBuyerLLCMember" name="WSHPCottonwoodBuyerLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ThirtyAprilTwoThousandAndTwentyFourMember" name="ThirtyAprilTwoThousandAndTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TransportationCargoMember" name="TransportationCargoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_HempzMember" name="HempzMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PPTGroupMember" name="PPTGroupMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AGSAmericanServicesInvestmentsLPMember" name="AGSAmericanServicesInvestmentsLPMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_UtilitiesWaterMember" name="UtilitiesWaterMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_LargestInvesteeMember" name="LargestInvesteeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SummerFridaysLLCMember" name="SummerFridaysLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FirstLienSeniorSecuredLoanMember" name="FirstLienSeniorSecuredLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_HotelGamingAndLeisureMember" name="HotelGamingAndLeisureMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_LogrhythmMember" name="LogrhythmMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_MeasurementInputBookValueMultipleMember" name="MeasurementInputBookValueMultipleMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax" name="UnrealizedGainLossInvestmentDerivativeAndForeignCurrencyTranslationOnDebtOperatingBeforeTax" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_CRHHealthcarePurchaserIncMember" name="CRHHealthcarePurchaserIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" name="PercentageOfShareholderServicingAndOrDistributionFeeOfAggregateNav" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_CubeMember" name="CubeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ChemicalsPlasticsAndRubberMember" name="ChemicalsPlasticsAndRubberMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_CashEquivalentsAtFairValue" name="CashEquivalentsAtFairValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_RevolverCommitmentMember" name="RevolverCommitmentMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ShareRedemptionPriceUsedPercentOfMostRecentlyDisclosedNetAssetValue" name="ShareRedemptionPriceUsedPercentOfMostRecentlyDisclosedNetAssetValue" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_RydooMember" name="RydooMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_NonQualifyingAssetsPercentageOfTotalAsset" name="NonQualifyingAssetsPercentageOfTotalAsset" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_CapitalEquipmentSectorMember" name="CapitalEquipmentSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AllbridgeMember" name="AllbridgeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ClassDSharesMember" name="ClassDSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_BCCHGSInvestments2LPMember" name="BCCHGSInvestments2LPMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PercentageOfManagingDealerReceiveAFeeOfOfferingProceeds" name="PercentageOfManagingDealerReceiveAFeeOfOfferingProceeds" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_AccidentCareAllianceHoldcoLLCMember" name="AccidentCareAllianceHoldcoLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AvalonBidcoLimitedMember" name="AvalonBidcoLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ClassOneSharesMember" name="ClassOneSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_HGInsightsIncMember" name="HGInsightsIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SpindriftMember" name="SpindriftMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit" name="InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesOtherThanBookProfit" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis" name="IncentiveFeeOnCapitalGainsAsPercentOfRealizedCapitalGainsOnCumulativeBasis" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_ApolloIntelligenceMember" name="ApolloIntelligenceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation" name="InvestmentCompanyIncreaseInNetAssetsFromChangeInIncomeTaxExpensesInUnrealizedAppreciationDepreciation" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_ConstructionAndBuildingSectorMember" name="ConstructionAndBuildingSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PlaskolitePPCIntermediateIILLCMember" name="PlaskolitePPCIntermediateIILLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SubordinatedNoteInvestmentVehiclesInterestRate" name="SubordinatedNoteInvestmentVehiclesInterestRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_JpmRevolvingCreditFacilityMember" name="JpmRevolvingCreditFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ReinvestmentOfDividends" name="ReinvestmentOfDividends" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_BeverageFoodAndTobaccoMember" name="BeverageFoodAndTobaccoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SpotlessBrandsLlcMember" name="SpotlessBrandsLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_BCCCPKInvestments2LPMember" name="BCCCPKInvestments2LPMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_EarningsBeforeInterestTaxDepreciationAndAmortizationOfMiddleMarketCompanies" name="EarningsBeforeInterestTaxDepreciationAndAmortizationOfMiddleMarketCompanies" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_RisksRelatingToCommonSharesMember" name="RisksRelatingToCommonSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_HeadsUpTechnologiesIncMember" name="HeadsUpTechnologiesIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_HollywoodLPMember" name="HollywoodLPMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AmendedAndRestatedBylawsDescription" name="AmendedAndRestatedBylawsDescription" type="xbrli:stringItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_SecuritiesTransactionsRevenueRecognitionAndExpensesPolicyPolicyTextBlock" name="SecuritiesTransactionsRevenueRecognitionAndExpensesPolicyPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_SixteenOctoberTwoThousandAndTwentyFiveMember" name="SixteenOctoberTwoThousandAndTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ClassSSharesMember" name="ClassSSharesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ForestProductsAndPaperMember" name="ForestProductsAndPaperMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_UnreimbursedExpenseSupportMember" name="UnreimbursedExpenseSupportMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RisksRelatingToInfectiousDiseasesAndPandemicsMember" name="RisksRelatingToInfectiousDiseasesAndPandemicsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InterestRateFloorNineMember" name="InterestRateFloorNineMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_GeneralRiskFactorsMember" name="GeneralRiskFactorsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_VasaFitnessLLCMember" name="VasaFitnessLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FinancingReceivableNonAccrualNumberOfLoans" name="FinancingReceivableNonAccrualNumberOfLoans" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_SaturnPurchaserCorpMember" name="SaturnPurchaserCorpMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PercentageOfMinimumUtilizationThreshold" name="PercentageOfMinimumUtilizationThreshold" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_BridgerAerospaceGroupHoldingsIncMember" name="BridgerAerospaceGroupHoldingsIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InterestRateFloorSevenMember" name="InterestRateFloorSevenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_MonarchFincoLLCMember" name="MonarchFincoLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_NafincoMember" name="NafincoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_OwlAcquisitionLLCMember" name="OwlAcquisitionLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InvestmentsOwnedExcludingInvestmentsUnobservableInputsNotDeveloped" name="InvestmentsOwnedExcludingInvestmentsUnobservableInputsNotDeveloped" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_MeasurementInputRecoveryRateMember" name="MeasurementInputRecoveryRateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_CPKIPCOBuyerLLCSubordinatedDebtMember" name="CPKIPCOBuyerLLCSubordinatedDebtMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SterlingOvernightIndexAverageMember" name="SterlingOvernightIndexAverageMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AtsMember" name="AtsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ChoreoMember" name="ChoreoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" name="AmortizationOfDeferredFinancingCostsAndUpfrontCommitmentFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_DelayedDrawCommitment1Member" name="DelayedDrawCommitment1Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ICATLogisticsIncMember" name="ICATLogisticsIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ManagementFeeExpenseContractuallyWaived" name="ManagementFeeExpenseContractuallyWaived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfTrailingQuarters" name="PreIncentiveFeeNetInvestmentIncomeCalculationNumberOfTrailingQuarters" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_RedMedOperationsCollageRehabilitationMember" name="RedMedOperationsCollageRehabilitationMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentyFourAprilTwoThousandAndTwentyFiveMember" name="TwentyFourAprilTwoThousandAndTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_MaximumFinancingCommitmentAmount" name="MaximumFinancingCommitmentAmount" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_DividendReinvestmentPlanPolicyTextBlock" name="DividendReinvestmentPlanPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_CommonClassIMember" name="CommonClassIMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InvestmentCompanyDistributableEarningsLossAccumulatedShortTermCapitalLossCarryforward" name="InvestmentCompanyDistributableEarningsLossAccumulatedShortTermCapitalLossCarryforward" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_ReceivedPurchaseOrders" name="ReceivedPurchaseOrders" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_CashEquivalentsPercentOfNetAssets" name="CashEquivalentsPercentOfNetAssets" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_SubstantialHoldcoLimitedMember" name="SubstantialHoldcoLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_G702BuyerIncMember" name="G702BuyerIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TartanBidcoPtyLtdMember" name="TartanBidcoPtyLtdMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_NewMilaniGroupLLCMember" name="NewMilaniGroupLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AdvancedAircrewAcademyLlcMember" name="AdvancedAircrewAcademyLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate" name="SubordinatedNoteInvestmentVehiclesBasisSpreadVariableRate" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_TwentySecondNovemberTwoThousandTwentyFourMember" name="TwentySecondNovemberTwoThousandTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentySixNovemberTwoThousandAndTwentyFiveMember" name="TwentySixNovemberTwoThousandAndTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ElevationNewCoIntermediateLLCMember" name="ElevationNewCoIntermediateLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RocSkincareMember" name="RocSkincareMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_HealthcareAndPharmaceuticalsMember" name="HealthcareAndPharmaceuticalsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InvestmentConcentrationRiskMember" name="InvestmentConcentrationRiskMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ChaseIndustriesIncMember" name="ChaseIndustriesIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RelatedPartyTransactionUpfrontTransactionFeeCapPercentage" name="RelatedPartyTransactionUpfrontTransactionFeeCapPercentage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_GaleriaMember" name="GaleriaMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ManagementFeeExpenseVoluntarilyWaived" name="ManagementFeeExpenseVoluntarilyWaived" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_StockRepurchaseProgramMonthlyRedemptionsPercentOfNetAssetValueMaximum" name="StockRepurchaseProgramMonthlyRedemptionsPercentOfNetAssetValueMaximum" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_OrganizationExpensesPolicyTextBlock" name="OrganizationExpensesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_HlrsHoldcoLimitedMember" name="HlrsHoldcoLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_EquityInterestMember" name="EquityInterestMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentyFourFebruaryTwoThousandAndTwentyFiveMember" name="TwentyFourFebruaryTwoThousandAndTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_HeliosServicePartnersLLCMember" name="HeliosServicePartnersLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PharmacyPartnersMember" name="PharmacyPartnersMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AsprPacAcquisitionCoLlcMember" name="AsprPacAcquisitionCoLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FiestaHoldingsLLCMember" name="FiestaHoldingsLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RfrLoanMember" name="RfrLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PreferredEquityInvestmentInterestRatePaidInKind" name="PreferredEquityInvestmentInterestRatePaidInKind" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_InterestRateFloorOneMember" name="InterestRateFloorOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_EighteenJulyTwoThousandAndTwentyFiveMember" name="EighteenJulyTwoThousandAndTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InterestRateFloorSixMember" name="InterestRateFloorSixMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_CommonClassSMember" name="CommonClassSMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RelatedPartyTransactionOperatingExpenseRatio" name="RelatedPartyTransactionOperatingExpenseRatio" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_TwentyFifthOctoberTwoThousandTwentyFourMember" name="TwentyFifthOctoberTwoThousandTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AllworthFinancialGroupLpMember" name="AllworthFinancialGroupLpMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ZeusFireSecurityMember" name="ZeusFireSecurityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RisksRelatingToInvestmentsMember" name="RisksRelatingToInvestmentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentySevenJuneTwoThousandAndTwentyFourMember" name="TwentySevenJuneTwoThousandAndTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PurchasePrice" name="PurchasePrice" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_ForPeriodFromThreeMonthAnniversaryOfClosingDateToFacilitiesEndDateMember" name="ForPeriodFromThreeMonthAnniversaryOfClosingDateToFacilitiesEndDateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_BainCapitalSeniorLoanProgramIILLCEquityInterestInvestmentVehiclesMember" name="BainCapitalSeniorLoanProgramIILLCEquityInterestInvestmentVehiclesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_GalanthusGroupHoldingsLimitedMember" name="GalanthusGroupHoldingsLimitedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SeventeenJulyTwoThousandAndTwentyFourMember" name="SeventeenJulyTwoThousandAndTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InvestmentPercentOfPortfolioFairValue" name="InvestmentPercentOfPortfolioFairValue" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_NonControlledAffiliateAndControlledAffiliateInvestmentsMember" name="NonControlledAffiliateAndControlledAffiliateInvestmentsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PinnacleAcquisitionLLCMember" name="PinnacleAcquisitionLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_DuracoMember" name="DuracoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InvestmentSecuritiesWeightedAverageYield" name="InvestmentSecuritiesWeightedAverageYield" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_AmberstoneCo.Ltd.Member" name="AmberstoneCo.Ltd.Member" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ThirtyOneJanuaryTwoThousandAndTwentyFourMember" name="ThirtyOneJanuaryTwoThousandAndTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_BankBillBenchmarkRateMember" name="BankBillBenchmarkRateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PolloTropicalMember" name="PolloTropicalMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FacilityAgreementsMember" name="FacilityAgreementsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ConsumerGoodsDurableSectorMember" name="ConsumerGoodsDurableSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_IncentiveFeeBasedOnIncomeMember" name="IncentiveFeeBasedOnIncomeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ScheduleOfCarryingValuesOfDebtTableTextBlock" name="ScheduleOfCarryingValuesOfDebtTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_EarlyRepurchaseDeductionValue" name="EarlyRepurchaseDeductionValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_LEPSALCoInvestLPMember" name="LEPSALCoInvestLPMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ValuationTechniqueCollateralCoverageMember" name="ValuationTechniqueCollateralCoverageMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PercentageOfSharesValidlyTendered" name="PercentageOfSharesValidlyTendered" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_InvestmentCompanyExpenseRecoupmentSupport" name="InvestmentCompanyExpenseRecoupmentSupport" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_SubordinatedNotesInInvestmentVehiclesMember" name="SubordinatedNotesInInvestmentVehiclesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ValuationOfOtherFinancialAssetsAndFinancialLiabilitiesPolicyTextBlock" name="ValuationOfOtherFinancialAssetsAndFinancialLiabilitiesPolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_BlackbirdPurchaserIncMember" name="BlackbirdPurchaserIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RepurchaseRequestDeadlineOnNovemberThirtyTwoThousandTwentyFourMember" name="RepurchaseRequestDeadlineOnNovemberThirtyTwoThousandTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure" name="InvestmentOwnedAtFairValueAndCashEquivalentsFairValueDisclosure" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_TermBenchmarkLoanMember" name="TermBenchmarkLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_CashAndCashEquivalentsHeldInForeignCurrency" name="CashAndCashEquivalentsHeldInForeignCurrency" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_RepurchaseRequestDeadlineOnAugustThirtyOneTwoThousandTwentyFourMember" name="RepurchaseRequestDeadlineOnAugustThirtyOneTwoThousandTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FactsGlobalEnergyMember" name="FactsGlobalEnergyMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FourthAmendedAndRestatedDeclarationOfTrustTerm" name="FourthAmendedAndRestatedDeclarationOfTrustTerm" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_AbrLoanMember" name="AbrLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PercentageOfOutstandingSharesPurchased" name="PercentageOfOutstandingSharesPurchased" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_ChexFinerFoodsLLCMember" name="ChexFinerFoodsLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_HighTechIndustriesMember" name="HighTechIndustriesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PureWaferMember" name="PureWaferMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_NumberOfFacilityAgreements" name="NumberOfFacilityAgreements" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_TwentyNineDecemberTwoThousandTwentyFiveOneMember" name="TwentyNineDecemberTwoThousandTwentyFiveOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_NumberOfBorrowers" name="NumberOfBorrowers" type="xbrli:integerItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_BeverageFoodandTobaccoSectorMember" name="BeverageFoodandTobaccoSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ETechGroupMember" name="ETechGroupMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_WealthEnhancementGroupWegMember" name="WealthEnhancementGroupWegMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InterestRateFloorThreeMember" name="InterestRateFloorThreeMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PercentageOfMinimumUtilizationFee" name="PercentageOfMinimumUtilizationFee" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_LindstromLLCMember" name="LindstromLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember" name="PreIncentiveFeeNetInvestmentIncomeExceedsCatchUpAmountMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RisksRelatingToTheNinteenFourtyActMember" name="RisksRelatingToTheNinteenFourtyActMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ProfessionalFeesAndOperatingExpenses" name="ProfessionalFeesAndOperatingExpenses" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_ForestProductsAndPaperSectorMember" name="ForestProductsAndPaperSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AerospaceAndDefenseSectorMember" name="AerospaceAndDefenseSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_StockRepurchaseProgramHoldingPeriod" name="StockRepurchaseProgramHoldingPeriod" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_DebtInstrumentEffectiveInterestRateSwapHedge" name="DebtInstrumentEffectiveInterestRateSwapHedge" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_LegacyCorporateLendingHoldcoLlcPreferredEquityMember" name="LegacyCorporateLendingHoldcoLlcPreferredEquityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_OrganizationCosts" name="OrganizationCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_TrancheBMember" name="TrancheBMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsSubsidiary" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisAssetGainLossIncludedInEarningsSubsidiary" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_AOMInfusionMember" name="AOMInfusionMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SensortowerMember" name="SensortowerMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_DiscoverySeniorLivingMember" name="DiscoverySeniorLivingMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SecondLienSeniorSecuredLoansMember" name="SecondLienSeniorSecuredLoansMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_DebtInstrumentInterestRateSwaps" name="DebtInstrumentInterestRateSwaps" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_VacationRentalBrandsLlcMember" name="VacationRentalBrandsLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentyThirdDecemberTwoThousandTwentyFourMember" name="TwentyThirdDecemberTwoThousandTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_WUHoldcoIncMember" name="WUHoldcoIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RealizedGainLossOnForeignCurrencyOfDebt" name="RealizedGainLossOnForeignCurrencyOfDebt" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_FireFinanceControlledAffiliateMember" name="FireFinanceControlledAffiliateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TrancheAMember" name="TrancheAMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_EuroInterbankOfferedRateEuriborMember" name="EuroInterbankOfferedRateEuriborMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RedNucleusMember" name="RedNucleusMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PrepaidFinancingCosts" name="PrepaidFinancingCosts" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_ReimbursementEligibilityExpirationDateJanuaryThirtyOneThousandTwentySevenMember" name="ReimbursementEligibilityExpirationDateJanuaryThirtyOneThousandTwentySevenMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RNEnterprisesLLCMember" name="RNEnterprisesLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ContainersPackagingAndGlassMember" name="ContainersPackagingAndGlassMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InvestmentOwnedAndCashEquivalentsPercentOfNetAssets" name="InvestmentOwnedAndCashEquivalentsPercentOfNetAssets" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_TwentySevenAugustTwoThousandAndTwentyFiveMember" name="TwentySevenAugustTwoThousandAndTwentyFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ScheduleOfUnrealizedAppreciationAndDepreciationOnInvestmentsForTaxPurposeTableTextBlock" name="ScheduleOfUnrealizedAppreciationAndDepreciationOnInvestmentsForTaxPurposeTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_PeriodOfTerminationByNotice" name="PeriodOfTerminationByNotice" type="xbrli:durationItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_FireFinanceMember" name="FireFinanceMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SubAdministratorMember" name="SubAdministratorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ScheduleOfReconciliationOfNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeTableTextBlock" name="ScheduleOfReconciliationOfNetIncreaseInNetAssetsResultingFromOperationsToTaxableIncomeTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAccretionAmortizationOfDiscountPremium" name="FairValueMeasurementWithUnobservableInputsReconciliationRecurringBasisNetAccretionAmortizationOfDiscountPremium" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_AlldentHoldingGmbHMember" name="AlldentHoldingGmbHMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SubscriptionsReceivedInAdvancePolicyTextBlock" name="SubscriptionsReceivedInAdvancePolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_EquityInterestInInvestmentVehiclesMember" name="EquityInterestInInvestmentVehiclesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ForPeriodFromClosingDateToOneMonthAnniversaryOfClosingDateMember" name="ForPeriodFromClosingDateToOneMonthAnniversaryOfClosingDateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_WPEFIXBidco23BVFkaKeystoneBidcoBVMember" name="WPEFIXBidco23BVFkaKeystoneBidcoBVMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ForPeriodFromTwoMonthAnniversaryOfClosingDateToThreeMonthAnniversaryOfClosingDateMember" name="ForPeriodFromTwoMonthAnniversaryOfClosingDateToThreeMonthAnniversaryOfClosingDateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AviationTechnicalServicesIncMember" name="AviationTechnicalServicesIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossSubsidiary" name="FairValueAssetsMeasuredOnRecurringBasisChangeInUnrealizedGainLossSubsidiary" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_BLIBuyerIncMember" name="BLIBuyerIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_LegacyCorporateLendingHoldcoLlcMember" name="LegacyCorporateLendingHoldcoLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_EnvironmentalIndustriesSectorMember" name="EnvironmentalIndustriesSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_AlertSRCNewcoMember" name="AlertSRCNewcoMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_LEPCPCo-InvestLPMember" name="LEPCPCo-InvestLPMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RepurchaseRequestDeadlineOnMayThirtyOneTwoThousandTwentyFourMember" name="RepurchaseRequestDeadlineOnMayThirtyOneTwoThousandTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PercentageOfShareRepurchases" name="PercentageOfShareRepurchases" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_FinancingProviderMember" name="FinancingProviderMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_WholesaleMember" name="WholesaleMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ReimbursementEligibilityExpirationDateNovemberThirtyTwoThousandTwentySixMember" name="ReimbursementEligibilityExpirationDateNovemberThirtyTwoThousandTwentySixMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_BCCTrilliumFoodsInvestments2LPMember" name="BCCTrilliumFoodsInvestments2LPMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PercentOfAssetCoverage" name="PercentOfAssetCoverage" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_EngineeredProductsCoLLCMember" name="EngineeredProductsCoLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PayRangeLLCMember" name="PayRangeLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PrecisionConceptsParentIncMember" name="PrecisionConceptsParentIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PrepaidInsurancePolicyTextBlock" name="PrepaidInsurancePolicyTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_CityBarbequeLlcMember" name="CityBarbequeLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_VitalPurchaserLlcMember" name="VitalPurchaserLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwoThousandTwentyFiveSeniorNotesTrancheBMember" name="TwoThousandTwentyFiveSeniorNotesTrancheBMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RecoupmentOfExpenseSupportMember" name="RecoupmentOfExpenseSupportMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_PRGXMember" name="PRGXMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TransportationCargoSectorMember" name="TransportationCargoSectorMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InvestmentsOperationsMember" name="InvestmentsOperationsMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SONIAPlusSixPointFourTwoPercentageMember" name="SONIAPlusSixPointFourTwoPercentageMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ThirtyMayTwoThousandAndTwentyFourMember" name="ThirtyMayTwoThousandAndTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ElectronicMerchantSystemsLlcMember" name="ElectronicMerchantSystemsLlcMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_EheHealthMember" name="EheHealthMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_InterestRateFloorFiveMember" name="InterestRateFloorFiveMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_EXTAcquisitionsIncMember" name="EXTAcquisitionsIncMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ScheduleOfNetAssetValuePerShareTableTextBlock" name="ScheduleOfNetAssetValuePerShareTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_ConsumerSectorDurableMember" name="ConsumerSectorDurableMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_RepurchaseRequestDeadlineOnFebruaryTwentyNineTwoThousandTwentyFourMember" name="RepurchaseRequestDeadlineOnFebruaryTwentyNineTwoThousandTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_BankOfNewYorkMember" name="BankOfNewYorkMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ValuationTechniqueComparableCompanyMultipleMember" name="ValuationTechniqueComparableCompanyMultipleMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SecondLienSeniorSecuredLoanMember" name="SecondLienSeniorSecuredLoanMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_MetalsAndMiningMember" name="MetalsAndMiningMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentyNineFebruaryTwoThousandTwentyFourMember" name="TwentyNineFebruaryTwoThousandTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_SubordinatedMember" name="SubordinatedMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_DebtInvestmentAmountOfUnfundedRevolversDelayedDrawposition" name="DebtInvestmentAmountOfUnfundedRevolversDelayedDrawposition" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_IncentiveFeeCapMember" name="IncentiveFeeCapMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TrancheBNotesMember" name="TrancheBNotesMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_GsRevolvingCreditFacilityMember" name="GsRevolvingCreditFacilityMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ScheduleOfInvestmentByGeographicRegionTableTextBlock" name="ScheduleOfInvestmentByGeographicRegionTableTextBlock" type="dtr-types:textBlockItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_DistributionAndShareholderServicingFees" name="DistributionAndShareholderServicingFees" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false" xbrli:balance="debit"/>
  <xsd:element id="ck0001899017_InvestmentPercentOfPortfolioAmortizedCost" name="InvestmentPercentOfPortfolioAmortizedCost" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_PercentageOfOutstandingSharesTheCompanyOfferedToRepurchase" name="PercentageOfOutstandingSharesTheCompanyOfferedToRepurchase" type="dtr-types:percentItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="false"/>
  <xsd:element id="ck0001899017_OnOrAfterFacilitiesEndDateMember" name="OnOrAfterFacilitiesEndDateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ElevationNewCoLLCMember" name="ElevationNewCoLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentyThreeAugustTwoThousandAndTwentyFourMember" name="TwentyThreeAugustTwoThousandAndTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_GovineerSolutionsLLCMember" name="GovineerSolutionsLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_NetAssetCommonStockValue" name="NetAssetCommonStockValue" type="xbrli:monetaryItemType" substitutionGroup="xbrli:item" xbrli:periodType="instant" nillable="true" abstract="false" xbrli:balance="credit"/>
  <xsd:element id="ck0001899017_BlackrockLiquidityFundsTFundInstitutionalShareClassMember" name="BlackrockLiquidityFundsTFundInstitutionalShareClassMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_EasyIceLLCMember" name="EasyIceLLCMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_DtiqMember" name="DtiqMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_ThirtyNovemberTwoThousandAndTwentyThreeOneMember" name="ThirtyNovemberTwoThousandAndTwentyThreeOneMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_BankingFinanceInsuranceAndRealEstateMember" name="BankingFinanceInsuranceAndRealEstateMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
  <xsd:element id="ck0001899017_TwentySixSeptemberTwoThousandAndTwentyFourMember" name="TwentySixSeptemberTwoThousandAndTwentyFourMember" type="dtr-types:domainItemType" substitutionGroup="xbrli:item" xbrli:periodType="duration" nillable="true" abstract="true"/>
</xsd:schema>
