unplugged harness connector reverse sensors

[Wiked8]

Got a VE ss s2 ute with factory reverse sensors, it is plugged in on rhr, but on lhr above the left muffler i have a multipin plug hanging in the breeze, both modules are fitted behind the bumper skirt.
My question is what does it plug into another module or a harness to the front cabin?
Also not display on head unit.