Data connections do not provide an easy overview of all the data connection data sources or their dependencies.
While search is possible using 'item_type' and 'depends_on' search terms, these are cumbersome and need to access an object, and get the id, and then search.
With information designer, it is easy to see all the data sources on one tab, and a right click on any source, schema, element to find dependencies, and on the source it is easy to "copy id"