Anyone care to elaborate as to what this is?

Cbtech

to me it looks like it could be a secondary button as a theft deterrent. Meaning you have to hold the button down like 5 seconds and wait for a chime then you can start the car. they used to have those at the dealers, back in my Valet days, but it was a chip that you needed to plug in, wait for the chirp, then you had 30 seconds to start the car. There were kind of stupid since you could just cross the wires and it would override the chip.