Another fuel gauge issue

Fuel gauge started not working then working about a week ago, now it doesn't work at all. Did the grounding test no movement at gauge, did a test light at sending unit no power. I had sending unit and dash gauges gone thru a couple years ago and re-calibrated and everything worked great till now. So I'm not getting power to sending unit, I'm looking at wiring chart and wondering where I marked with arrow what plug in connector that is? Would that be under carpet up by shifter? I always go by miles even with fuel gauge, 200 time to fill up. Thanks