RefScope only shows the mesh path if the file is missing, which it isn't in this case. But as washington said, you can look up that FormID in TES4Edit (or even just the CS, assuming you don't have any other mods overriding that object and changing its mesh path) to find out what nif it uses.
It would be convenient if someone would make a comparison of RefScope and FormID Finder. They both seem to have some different features.
In a nutshell, RefScope provides more detailed information than FormID Finder, but as a result it sometimes requires a bit more modding knowledge to understand what it tells you. Other than that, they're pretty similar in purpose, and I think Asesino and I have both drawn ideas from each other.
FormID Finder's user interface is based on scrolls, which present the information in a nice-looking way with fonts and colors, but aren't interactive. RefScope's user interface is based on MessageBox menus, which are more constrained for space on the screen (that's why I don't show file paths if they aren't missing), but they have buttons that let you navigate around to browse lots of related information beyond what appears on the first "page".
(NB: I'm the author of RefScope, so I'm naturally biased and I don't use FormID Finder much.)