Yes, see the eCart Getting started guide.
in Step 2: Add to cart buttons, there is the following note:
NOTE:If you intend to create Add to cart buttons that reference your products in a database, you will need to have a Recordset already created on the page you are adding the button to. If this is a product results or product details page created by DataAssist, this will already have been created for you.
The "Dynamic Add to cart buttons" section also shows screen shots of how the bindings panel is to be configured.