CS-Cart is a shopping cart solution for building an eCommerce website of any size: from a small web store to a virtual shopping mall.
The integration is done by adding a custom tracking code to it's 'Thank you' page. You can track subtotal, product ID and order ID with it.
Login to your admin panel and navigate to Design> File editor. Now, use the left menu to open file Templates> Views> Checkout> Complete.tpl
Edit the template
Place the sale tracking code to the very end of the file:
Save your changes. You are done.
Do not forget to integrate your site with the click tracking code to make it all working correctly.