What field in Customer FBDI file links to Original System Bill/Ship-to Account Reference (AR FBDI)?

Summary:

Currently I am trying to populate the following fields in the AR FBDI template. Both fields below are in the 'RA_INTERFACE_LINES_ALL' sheet:
- ORIG_SYSTEM_BILL_ADDRESS_REF (labeled as 'Original System Bill-to Customer Address Reference')
- ORIG_SYSTEM_SHIP_ADDRESS_REF (labeled as 'Original System Ship-to Customer Account Address Reference')

I am attempting to identify which fields in the Customer FBDI template corresponds to the fields mentioned above, please advise.

Version (include the version you are using, if applicable):

26C