Mystery wire in headlight harness

I wonder?? If this could be the stubbed out unused wiring for the "fuel pacer" nonsense. This was a vacuum switch connected to the left turn fender indicator, and turned the indicator on if you had "too big a foot" lowering manifold vacuum

That system didn't come along till 74 or 75. My friend had one on his 75 Dart Sport. It actually worked. Until he swapped in the 340. :D