Help! I found a plug without its mate. I checked the Bentley, my Manual, but
I can't figure out where it might belong. Just couldn't find a matching
socket.

Description: engine compartment facing front of car, 3 pins male, approx.
3/4" diameter, with metal bracket, gray cable disappearing under the
carburetor, turning towards front of car and appears to enter the engine
housing/manual transmission from the top rear end on passenger side where
there is a vertical plate. The cable is not very long, so the radius where
to look for the socket is less than a foot.

Thanks
 Joachim