How to map new and old Tableau Datasources

Mapping.xml

<?xml version='1.0' encoding='utf-8' ?>

<datasource formatted-name='XXXX' inline='true' version='9.0' xmlns:user='http://www.tableausoftware.com/xml/user'>
    <!-- build 8100.14.0717.0952                -->
    <connection class='New Skool DB' dbname='DB' odbc-connect-string-extras='' port='####' server='some_connection_string' single-node='no' sslmode='require' username='username'>
        <relation name='database' table='[Tables/Views].[Contacts]' type='table' />
        <cols>
<!-- Paste all the new XML in here -->
            <map key='[MyPeople]' value='[Contacts].[mypeople]' />
            <map key='[YourPeople]' value='[Contacts].[yourpeople]' />
            <map key='[OurPeople]' value='[Contacts].[ourpeople]' />
        </cols>
    </connection>
    <column datatype='integer' name='[Number of Records]' role='measure' type='quantitative' user:auto-column='numrec'>
        <calculation class='tableau' formula='1' />
    </column>
    <layout dim-ordering='alphabetic' dim-percentage='0.5' measure-ordering='alphabetic' measure-percentage='0.4' show-structure='true' />
    <semantic-values>
        <semantic-value key='[Country].[Name]' value='&quot;United States&quot;' />
    </semantic-values>
</datasource>