72 Duster Fuel tank sending unit diagram?

If you REALLY want to follow diagrams, don't use the 2 page aftermarket ones like posted above, although THEY HAVE their place. They can be easier to follow at times, BUT they sometimes leave out connectors and options.

Go to MyMopar and download the 72 service manual. It got there, by the way, along with a few others on that site, because of the guys right here.

That connector you found mates with a connector in the "instrument panel" section. From the kick connector, it simply goes up to the dash cluster connector, connects to the PC board (not shown in the diagram) and on the PC board trace, runs over to the "sender" terminal on the fuel gauge