Where do I find the switch?

["Adriaan Loedolff" <aloedol@engfac.uct.ac.za>]

Hello to you all

I posted this some time ago but I only received one reply that didn't 
help too much. So if anyone can help:

Up until '66 (I think) the door hinges at the rear door of the 
Variant had a full width metal cover that had a light fixture in the 
middle. The light would come on if  the door is opened and the 
headlamps are on.

Where is the switch located that turns this light on and off? I have 
searched high and low (literaly) to find it to no avail, as I have a 
hinge cover like this and I would like to install it in my 69 Square 
and I would like the lamp to work as well. 

Regards

Adriaan Loedolff
aloedol@engfac.uct.ac.za
69 Squareback Automatic