Tap Transfer at the bottom of the screen. (Also available in the Menu)
Select Pay Loan by Card (if using for the first time, accept the service agreement). If you have a loan that's past due, you can tap Make Payment Arrangements to start that process.
Select the loan for which you’d like to make a one-time payment, fill in your non-SELCO card information, then press Review. Note: External debit cards and ATM cards, as well as MasterCard and Discover credit cards, are accepted. Visa credit cards are not accepted.
If everything checks out, tap Submit, and your loan payment is set.