Step 1: To get the link of the Sign-up Page, from the Admin Dashboard click on "Configure Sign Up Page".

Step 2: In the following page, click the link "View Sign Up Page".

Step 3: You get the Sign-Up Page where you can copy the link from the Address Bar at the top.

Step 4. Log in to your foxy cart account. Below templates select cart.

Step 5. Add the refferal link below the footer and update template.