Rally Dash Wiring Harness Questions

So the 71 Dart standard inst' panel had 2 inline connectors. That plug in type IVR was near the center of the panel, on the board with the gauges. It got its 12 volts from the same black wire as your rally limiter ( in the fuel gauge .) This black wire ( detailed earlier ) should have been in port 3/center of the 5 pin connector that had the gauge sender wires in it. It goes to 10 o'clock port of round connector of rally harness. If it is MIA, it had to be cut out of weld splice 2. If you must add it, may as well add it where it belongs.
I haven't found that connector and bulb with all those blue wires yet. This 71 manual shows reverse lamp wires as black also.