How do I record interest charges on a Line Of Credit?

I have a line of credit, my bank doesn't display individual transactions online. So the monthly interest increase isn't automatically recorded in QBO. I used to be able to add an increase in the amount owed through "add an expense" section. That pathway now requires an account the payment comes from, and it will deduct from that account. Which is problematic because the interest charges are paid for and already accounted for in my monthly payment.