1979 Chevy Van reverse sensing switch

Electrical problem
1979 Chevy Van V8 Two Wheel Drive Automatic
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Can you help
1979 Chev work Van
Cannot find Reverse Sending Switch on Transmissiopn
as was told here in my first post

I looked for part for 79 Chev van on net and found the part and the part appears to go somewhere on the stearing column
Horse shoe shaped.

Can anyone help with information