Below are screenshots that illustrate what settings go where in each of the API configuration fields both in The Uniform Solution and the backend of a TUSe website.
In The Uniform Solution, some of the information needs to be provided by Seller’s Commerce. That information is placed in the section “Outbound Access to 3rd Party Web Server.” See below.
In the backend of the TUSe site under the store settings is where you’ll find the information to plug in to complete the API connection. The image below shows what information goes where.