I had to move some wiring/lines to get to the clutch master cylinder. Now that it's all back in and going, I've noticed this plug and socket arrangement in the top left corner of the bay
I cant remember if it was connected or not before I moved everything around. The car seems to run fine with it in it's current unconnected state.
What the hell is it?
Car is an auspec ae86 with an ae92 AFM 4agze