Could someone assist with where this came from and what it does?
If your car has remote start, then look at the frame in front of the battery for an aftermarket hole with a switch (likely broken) installed in it. The switch is where your connector was connected before the switch broke. You can order a new switch from amazon. This is what I ordered Amazon.com: Winnerbe 2Pcs Adjustable Car Truck Bonnet Alarm Light Hood Door Pin Switch 69mm Universal: Automotive when this happened on my car.i bet you're right.. auto start