Maestro obd2 wires question

So I’m slowly installing my DNX996XR in my 19 tundra non jbl but amplified. Just making harness connections outside the truck right now and can’t figure out where the red and yellow wires with the black plug from the obd2 plug in..... the white plug with the grey/red wire is obvious but can’t find a black plug....any help??

 

Okay so far every other one I see or read about only has the grey/red data wire with the white plug....I’m confused

 

Any luck figuring this out, OP? Sorry, don’t have a RR. No tips in the Idatalink online manual?

did you buy the TO2 harness kit or that the generic one that came with the RR? I was just wTching this video and their OB2 plug only has one connector on the other side.
https://youtu.be/GhiMy1GPayE

Fast forward to 3:45

 

It plugs into the Maestro T02 harness.

 

I finally got an answer that it doesn’t go to anything ‍♂️

 

There is no plug on the maestro harness that accepts this plug. I got an answer, and it was that particular plug goes nowhere