The Check Connector is in the main wiring harness, right above the distributor, about five inches above it. It is just above the oil dipstick. There are two wires going to the distributor, one of them being black/yellow stripe, going from the distributor to the rev switch. One half of this Check Connector is spliced into this wire. I have a photo of this check connector but this forum will not let me post a link to it on Photobucket. Perhaps you can search for it on Photobucket under george7941.

The terminals on this connector are the round bullet terminals, typically used by Grote for their truck lights. These terminals are larger than Weatherpack terminals. There is a translucent plastic cover over this connector.