Double check - Reverse light

73, Duster. 4 Speed

I traced one black wire from my reverse light that comes out the firewall above the MC. I have it connected to my 4 speed transmission wiring. I noticed another plug of the same type with two black wires to the left of it. I’m not sure what those are for, from my wiring diagram I downloaded. Just want to make sure I have this hooked up correctly.

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