Location is not an object class like planets, moons, ...
This is why the location files of type ssc start with a declaration "Location".
The search for a "return" location in celestia must be done differently.
In the input field, you must enter the path of the object containing the desired location. For example: for "Apennine ..." on the Moon, you must enter: / Moon / Apennine if you are in the Solar System and / Sol / Earth / Moon / Apennine if you are outside the Solar System.
If the search does not look like this, you may not find locations with special characters such as apostrophe.