Although I'm not 100% confident, I'd say the fog lamp cover is used to direct the light DOWN to the ground, so the cover/cup would be mounted in the upper portion of the reflector.
As for installing the fog light springs/clips that hold the unit together, here's a post I shared with Allen Gasper who was frustrated with the process.
"This process is frustrating, so expect to be mad for about an hour while you learn how to get the clips in-place successfully. It takes me a good 20 minutes to assemble the clips into place, so don't worry. Before you start this fun ... remember that the fog light is a part exclusive to the T34 and the no other vintage VW owner has to experience this task, only T34 owners. It's a priviledge & an honor to own a T34. You wanted this kind of exclusivity when you decided to care for your T34.
Assemble in this order: - get a cold beer from the fridge & take a long drink - place the bulb into the bulb holder (D) & clip the clamp (C) over the bulb to hold it in-place - place that unit into the reflector (B) - insert the refector cover (F) with the large cup part in the lower section of the reflector - insert the reflector unit into the inner ring (H) by sliding the two spark plug bits over the holes in the sides of H - insert the lens into the rims of H, making sure to keep the words TOP on the glass lens at the top centered in the cut-out of H - place the chrome outer ring (G) over the lens - turn the whole unit over 180 degrees so you can see the bottom of the fog light bulb. Hold everything in-place - look at the metal clips (E): with one long end & one short end. - place the long end into the space between G & H. Position the bent portion against H and try to hold it in that position (I've found using a screwdriver into the space helps) - with a second screwdriver bend the small end of the metal clip down into the gap between G & H. It's a spring-loaded fiasco if you let go of the metal clip and it flings-out, so be careful. - take a long drink of your beer to relax & reset for the next try - with some practice you'll manage to get the metal clip to wedge itself between G & H. - repeat the process with the three other clips. Four total."
Last Edit: Jul 16, 2011 8:06:31 GMT -8 by Lee Hedges