How to map UDFs from the JT_Transaction Entry DIST through to Lot/Serial Transaction History

I have added UDF's to the JT_Transaction Entry Dist table and added it to the Serial Distribution Panel in Work Ticket Completion.  That works fine.  However, I can't see how to map the UDFs to Lot/Serial Transaction History.  Does anyone know the table I need to add the UDFs to inorder to Map it through?