Yep, there's an IC Chip on the PCB board, knack that and you're in for trouble
I've had mine apart to see if i could fix the faulty boot release button. I remember the plug having 4 wires (i think). My sporting has 5 buttons, all controlled through the PCB and out through these 4 wires. Buttons on mine are Boot, City Steering, Locking, Hazards, ASR. The circuit behind them all route through the IC then to the plug.