We're impressed with how grateful you are. You must have been raised in the American south. Or maybe the Midwest. Or perhaps you're British - those folks know manners!
OK, for real:
If you have multiple thank you URLs, the best thing to do is to generate your code with one of them and then open a ticket to send us your additional URLs.
We ask that you wait for confirmation from us via the ticketing system that all URLs have been properly configured before you start sending emails in your abandoned cart campaign.