You can add your StickyEmail Slide-Out and Exit Pop Up Forms to specific pages within your Square Space site. To do so follow the directions below.
1. Copy the form code (Slide-Out or Exit Pop Up) for your email sequence.
2. Open your Square Space Site Editor
3. Go to Settings -- Advanced -- Code Injection
4. Paste the copied code into the header section.
You can add both a slide out and exit pop up embed code to the same Header Section. For additional details you can read how to use Code Injection here: Squarespace Code Injection
Note - Using Code Injection for your entire site, is different and you add the code to the footer under the site wide settings. When doing on specific pages use the header.