1974 Duster Ammeter Bypass

OK. So what I have pictured is the factory wiring coming from the barrel connector for the circuit board on back of instrument cluster. Bottom image.

The other is the Painless harness. The two red wires go into one connector in the barrel as does the two black wires. Wiring diagram does NOT show these wires. I am not seeing where these would logically hook up to. All help is appreciated.

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