I'm thinking it's something to do with the alarm, I don't think it's standard and some wires running from this loom down here are running to the led light and to the sensors.
The wires pretty much come through the car into the footwell area, connect to some thee things and are just looped back around, not going anywhere.
So this connector may be the original one to connect up the alarm.
No idea why it would be changed.. And I still can't get it to go off so I can unplug the fuse and see if it kills it. Ive had it go off before just can't remember how!