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.