Step 1: Adding your Squarespace site to ConvertBox
Make sure that the site created inside your ConvertBox dashboard matches the domain of your SquareSpace domains
If you’re using a SquareSpace domain then your site will be yoursite.squarespace.com
If you are using your own domain then your site will be mydomain.com
See this tutorial on how to add a site to your ConvertBox account.
Step 2: Add ConvertBox’s embed code to Squarespace
Login to your Squarespace website.
In the menu on the left select SETTINGS.
Under the website heading, select Advanced, then Code injection.
Paste your ConvertBox embed code into the second box down, labelled Footer, then press save at the top.
To locate your ConvertBox embed code see this tutorial.