reverse lights

I saw some threads on reverse lights when I searched but they were for AOD swaps. But I saw a good photo, and I need to check the tranny of my car to see if something happened.
Anyway, my reverse lights are not working, and its not the bulbs or the fuse. So, is the plug in the tranny the only thing left? Its been raining non stop so I havent been able to check under the car yet. Also, I found this diagram for a Tremec 3550, can I assume its the same on my TKO?
backup light switch.GIF
 
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