How to add "Home Page" UI action button on the survey submission page in the walk-up portal

[B Y1]

Hello, 

In the ServiceNow walk-up portal we would like to add a UI action button on the survey submission page that allows the user easily navigate back to the home page of the walk-up experience after submitting the survey. Currently it's re-directing back to the same survey page instead home page after submitting the survey. 

Home Page : 

Survey Page : 

Thanks in Advance