HUW questions
 

Two questions, perhaps somebody has pics or access to a vehicle to confirm.

There are two dome lights in the back of a Chev HUW. One is centered on the roof just forward of the sliding roof hatch. The rear one I need help with. I have three possible locations: first is welded to the roof centered over the rear door (based on a HUW now in Greece), the second, welded to the inside of the rear body panel just to the right of the rear door (I have WW2 photo evidence of this but no corresponding welds on my HUW) or, third, based on a remnant in mine, welded to a vertical body channel behind the right hand storage bins (if that's what I'm looking at). What is correct? Did it change over time?

Second, is there a source for the porcelain collars as shown on this switch box? I imagine they are common 1940's household fuse box items but I'm having a hard time finding the correct type.