Which SQL Stored Procedure does BI.AIC.00 execute?

I am trying to update the TermsID value associated with Invoices. I have VBA which sets my preferred value within BI.BAM.00, but this logic does not get considered during the Automatic Invoice Creation process.

I imagine that upon clicking "Create Invoices" on BI.AIC.00, somewhere along the line a SQL Stored procedure is being executed to Insert the values. My thought is that if I cannot set the default within SL, I'll set it within SQL either by updating the INSERT or by creating a TRIGGER with an UPDATE.

I would prefer to update the Stored Procedure INSERT but would input to be sure I'm hitting the correct place and not overlooking anything.