Since this is an open data product, it is likely that many users will be getting data from different sources. Therefore it is important that the word "Source" be used only to describe the place where the content originated, and not where the current layer is hosted. It is currently confusing.
Instead of "Source" next to the item description as it is currently, perhaps one of the following words would be more appropriate: "location", "URL", "Service Location", "API Address" , etc.