Wires
Doc here:
According to the book it's the right one for early model Vettes...I think someone has changed wires on you at some point..The book only shows two versions, Early, 68 to 75 and later 75 to 82
The Wiper doors Should have a Vacuum switch mechanically attached to the wiper control switch like the Headlight doors.
In fact it uses the same vacuum source, Look to see if you have 2 vacuum taps coming out of the switch, If not, maybe someone put a Different system in there years ago..
You also have a "Park" interlock switch prevents the motor from running while the doors are closed this might be your problem also. I think it's located at the wiper doors..
Not a lot of info on this one..
Doc