How to integrate Fine Art America shopping cart widget with Squarespace?

Has anyone successfully integrated the Fine Art America shopping cart widget with a Squarespace site? It requires adding some script code to the page, which, when done as a code injection in the header, is no bueno.

My goal is to be able to have the "Purchase options" link under each of my photographs open the FAA shopping cart widget. You can see said link on the Collection One page of my site.

To help, we'll need some more information. Please provide a working link to the page on your site as well as details of the code you are trying to add. 

7 hours ago, jschussler said:

Has anyone successfully integrated the Fine Art America shopping cart widget with a Squarespace site? It requires adding some script code to the page, which, when done as a code injection in the header, is no bueno.

 

My goal is to be able to have the "Purchase options" link under each of my photographs open the FAA shopping cart widget. You can see said link on the Collection One page of my site.

I can only find reference where artist inject the whole shop page as a iframe embedded

https://www.derekrussellartist.com/prints-for-sale