Please create custom logic for SFDC Connector, you can use tenantDataModification or sfdcDataModification depending on your requirements.
Parse them and do the mapping.
https://docs.reltio.com/en/integrate/integrate-data-between-applications/integrate-apps-using-prebuilt-connectors/synchronize-data-with-salesforce-connector/object-and-field-mapping/salesforce-connector-custom-logic
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Radhakrishnan Ramalingam
Architect
San Ramon CA
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