Cut Spliced Wires under Driver's Kickpanel

Hi all,

I just came home with a new-to-me 2014 Platinum I got from a roadside dealer with 160k on it. The truck came with a lightbar only somewhat tastefully added in the lower portion of the front grille, and I was at a loss of how to turn it on until a switch literally dropped out onto my foot while driving home. Eureka! It even works. I'd planned to remove the lightbar, I'm not a big fan of such things. While I was down there, I peered up into the dashboard innards a little and I noticed a connector that wasn't connected to anything, accompanied by a cut brown wire. Oh boy. I pulled the kick panel, and sure enough, there's a bunch of wires running to various connectors that have been hillbilly spliced, wrapped in electrical tape, and then cut. So somebody's been in here doing some shenanigans. Biggest question - what's that connector supposed to plug into?

Mostly I'm concerned that somebody has done some major nonsense with the electricals on the truck. There are a couple of things either not working or malfunctioning - TPMS light is on despite correct pressures and reset procedure followed, driver's heated seat is not working (passenger is fine), a couple other odds and ends I'm probably not remembering.

Some first post background: I'm an engineer and shadetree mechanic with extensive experience in automotive systems including electrical work. Have rebuilt many-an-engine, work primarily on vintage Volkswagens, though have had my fair share of modern car moments as well.

 

Probably some kind of remote starter or security system a previous owner installed and then removed when they sold it.

 

These trucks have quite a few unused connectors. They are prewired for different things depending on trim level.