Where is the back up light switch located on a 1989 Westfalia Vanagon?

I am no expert, but I recently found what I think is the back up light switch for my 85 vanagon w/ manual transmission. I didn't have another to replace it with and test it, however it is relatively easy to get to and try. Looking from the rear, on the left hand front of the transmission you'll find two wires that lead to a two pronged mechanical pressure switch. Unscrew it from the transmission. Swap the wires and install the replacement.