Issue with Constant Contact Universal Code?

I am trying to deploy a Constant Contact form that I made in Constant Contact on our Twenty Twenty Two based site (because the Constant Contact Form plugin is pretty poor when it comes to out of the box utility). I am struggling to understand where I need to add the universal code (the CC guide says that it goes in a widget (Appearance > Widgets)) so that I can then add the inline code on the page where I want it to display. Any help would be greatly appreciated.

The page I need help with: [log in to see the link]