Step 1: Find your replacement code within SmartrMail. Instructions on finding this code are here:
Step 2: Navigate to the "My Themes" section of the Big Commerce dashboard and click Edit HTML/CSS
Step 3: Search for where your signup form is located. This is usually in the SideNewsletterBox.html file.
Step 4: Replace the <form> action attribute with the SmartrMail action attribute ex. "https://go.smartrmail.com/subscribe/xyz"
Step 5 (optional): Replace the name attributes for the first and last name inputs. The name attributes are "FNAME" and "LNAME"
Step 6: Click Save