At some point, someone unbolted anything that took zero work from my car. I’m now searching pics and diagrams to find out what I don’t have.
Todays question? Green wire under the battery tray? Nothing there to plug in….

Kevin

Could be the lead for the engine oil temperature sensor. If I recall correctly it is a green/black

Leaning towards this also.

It was in the harness even if you did not have the gauge.

There is a wire there that every new owner asks about, and it actually doesn't have a home ...

I have wondered if the black strip could fade or wear off. That made the most sense, thanks guys til the next time!