ACH Include Auto-Settle-Line

Could someone please direct me to where you setup the Auto-Settle Line in Cash Management in GP 2013?

I'm checking the box on the ACH Fields Setup for Include Auto-Settle-Line and get popup saying "You must enter a bank routing number, account number and account name for the Auto-Settle Line (ASL) in Cash Management." I thought I set it, but I must not have. Or does it pop up that warning even if you have it set?

What I'm trying to accomplish is to get another line added to the ACH file that shows the debit to checking account to offset the credits. Is this what the Auto Settle Line does?

Thanks,

George