74 Duster w/ AC electrical

[keenkeener]

I am trying to fix several wiring issues under my hood on my duster w/ AC. Someone that didnt have much respect for the car, owned it before me. Does somoeone have a diagram or know what the square plug between the brown and blk-yellow wires at the coil, and the ballast resistor and the ecu respectively? My diagram does not even show this. It goes straight from one to the other. Each side of the plug has spots for eight wires, but only 6 are used. If anyone has a diagram for AC cars, this would be great.