Freight Update with FT voucher batch creation

Hi,

I am trying to find this specific information. After we do the freight update, E1 creates FT batches. While the rate is being pulled from the rate defn and routing entries, from where the bank account is pulled in the FT batch? Does it look at the PB AAI for the company for the bank account? I was in the impression that E1 looks at the PB AAI only during the payment process. Apparently it does not. I change the PB AAI account after the creation of FT batch. E1 credits the bank account mentioned in the FT voucher.