Photo's?? needed or explanation

this is specifif to a 1967 Chev van with factory powerglide in it -came also with factory V-8- Im trying to figure where the backup light switch hooks to?? Could even be a neutral start switch -I really dont know ? This is situated near the powerglide tranny & has a bracket incorporated in it. It even on the bracket has a threaded hole where a bolt goes in it to locate it. It is a different bracket (switch)than a 6 cyl. model- as I have a pic of that one. This bracket doesnt seem to belong at the same location as the 6 cyl switch mounts?? So = what im asking for is there anyone who knows exactly or has a foto of this paticular install?? Thanx