That makes things a bit trickier as it means it's an unnamed frame and you're just getting a reference to the table.
Could do a search in files for CreateFrame( and look at lines that don't supply a frame name but do have a :Show() or :EnableMouse(true)
CreateFrame
Look for lines where the 2nd parameter is nil or there is only 1st parameter and no others.
Note:
I haven't looked at the addon so I'm assuming the frame creation is done in lua and not xml.