No installation manual

Easy plug in color coded installation EXCEPT there are two wires remaining. Another black wire (ground?) and a white wire which I assume would connect to the fuel sending unit since the gas guage isn't working but the sending unit wire is pink so I hesitate to connect two different colored wires together without a wiring diagram on such an expensive unit. Other than that, everything works well and looks great. Just wish they could provide some instructions. It's just the unit and the box.

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