Hello There
The ManagePaymentSources Hosted Page is a part of the new version of our Checkout Pages. It currently allows customers to add multiple payment details, however, specifying them as primary or backup is currently not available.
You can, however, use the Assign payment roles API for this purpose.
Lajos Sz
It would be great to allow customers to set primary, backup payment sources in the ManagePaymentSources Hosted page.