Does anyone know how to change the Bank account defaulting into the Core form when you do a pay in f

We have more than one internal bank account and we would like to change the default account that is appearing currently on the core forms when you try to do a quick payment.

Navigation steps to recreate issue:

Use Payables Manager > Query/create a new invoice on AP workbench > Use Actions "pay in full" the system then takes you to a core form which has a column called Bank Account.

We would like to change the bank account that currently defaults in, to another account which is used more regularly.

We have not been able to find out where the form takes this info from or how to change the default value?