There are two ways to add your Tower debit card and credit card to Apple Pay.
1. If you already have a Tower debit card and credit card on file with your Apple iCloud account, you can add it to Apple Pay by entering the security code on the back of your card in your Apple Wallet® or in Settings.
2. To add a new or second Tower card to Apple Pay,
Go to "Wallet > Click the + in the top right corner"
Select "Credit or Debit Card" to enter new card information.
Go to "Settings > Wallet & Apple Pay."
Select "Add Card" to enter new card information.