I came across these steps, and they're very well explained. thank you

If I could ask, is it best to add a beginning amount/ LOC  principal? I've been recording my transaction just as you've mentioned but noticed I never added the principal amount.

Can someone please guide me through the steps to adding the principal if possible?

Lastly, if I have two different LOC from the same bank but each has its account number.  "When recording payment/writing check-in QB desktop is it best to write check PAY TO THE ORDER Of the bank name or use the name of the bank and last four of the account number to separate both loans.? 

Thank you