What is the payment zip cord

That has to do with the information for your bank. If you open Wallet, select the Apple Card, then tap on the three dots in the upper right corner. Scroll down to Bank Accounts to add your bank as a payment method. It is probably asking for the address for your bank. You should have that information.

What do you mean by adding your Apple Card to your bank? What exactly are you trying to accomplish?

You're welcome.