I've had a cel for a few weeks related to my front o2 sensor. Not wanting to go and drop a hundo on a new one I have been tracking down any possible problems. While pulling up my passenger carpet a bit to get to things, two things caught my eye.

First is this cable connector that had the exposed end in a plastic bag. No idea what it is.

just above that was another wiring harness but it had a couple of wires clipped. For all I know my car has been running great ever since I had it but if anyone knows what these are for I do love knowledge. For the cut wires it's the red double wire( dunno what they are called)