I think I recognize that first one. That in the passenger footwell? Just about where your second knuckle is on your index finger look up and behind that plastic. There is a thin piece of aluminum that has a little plastic retainer pushed through a hole in it from the top side of that aluminum. That plastic retainer holds a wire harness that I believe what you are showing, plugs into. DAMHIK, well you can, ok I used that piece of aluminum recently as a ground for a Dash Cam hard wire, ground. I drilled a hole through the aluminum from the bottom to screw into and was making sure there was nothing above it and that is how I saw the wiring harness up there anchored to the aluminum with the plastic retainer poking through the bottom close to where I drilled a hole.
Hope that makes some sense.