How can I link a manually created financial category to the Prepare Reconciliation tool

Summary:

How can I link a manually created financial category to the "Prepare Payables to General Ledger Reconciliation" and "Prepare Receivables to General Ledger Reconciliation" tools?

What happens is that we need to have a break in the "accounts receivable/payable" sources without losing the functionality of the reconciliation tools between finance and accounting. 
Is there somewhere we can link these categories created in the reconciliation mentioned above?

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