Adobe Sign with Payment

I am trying to figure out how to send out a customer contract to be signed along with payment to be processed.

From my understanding, Adobe Sign uses Braintree, but myself I use Square payments for my business. 

I can create a link in which when customers use it, it will take them to the payment page.  Problem I have with Adobe Sign is that when I add the link to the Contract Email, it is not clickable, and is only displayed as text.  Is there a way to make that link clickable?   

One solution is simply for the customers to copy and paste the link, but a lot of them are older age and it is difficult to understand how to do so.  Trying to make it simple.