Wrx sti Ed

Going to remove this from my car before the insurance take it tomorrow, it has two plugs coming out of the rear of it. I know the larger plug is for the OBD port, but does anyone know what the small plug is for? I've followed it behind the centre console and I lost it going through the bulk head. Here's the model I have. Any help would be appreciated!

M2RTXhawkeye

iTrader: (61)

Could it be a sensor linked to something mate?

Martin

Yardz

iTrader: (1)

This^