Hi Brian,
The "Order" action present in the Catalog Item results comes from the Search Action definition for the contextual search.
You can find those settings by navigating to the following:
Contextual Search > Table Configurations
if you open the record for Incident table, you will see the following form:
The search action configurations mention what actions are available with the results. You will see for ServiceCatalogSearchResource the action available is Order. But unfortunately, I didn't find any way to create new Search Action configuration, nor I was able to find a way to create a new search action (You can navigate to the search action record by clicking on "Order"), as it appears to be read-only, and there is no "New" button for that table.
ServiceNow documentation only mentions about modifying the existing search actions (modifications like changing label). Here is the link for the documentation:
So, from what I see, I would say it won't be possible to add another action by using the out of the box components. One option could be checking the AJAX Utils which populate the details once it fetches the search results. Maybe tweak the UI Macro, to show the custom button to attach link to catalog item.
Hope this helps!
Cheers,
Manish
