What are the original codes of ""click here to unsubscribe" from the survey email distribution?"

In the "Message:" box, at the end of email intro part, Qualtrics has the default codes:
Follow this link to the Survey:
${l://SurveyLink?d=Take the Survey}
Or copy and paste the URL below into your internet browser:
${l://SurveyURL}

But because I changed my coding of click here to unsubscribe, I don't have the original code. What's that? What I want is:

Follow this link to the Survey:
${l://SurveyLink?d=Take the Survey}
Or copy and paste the URL below into your internet browser:
${l://SurveyURL}
Follow the link to opt out of future reminder emails about this survey:
??????WHAT IS??????