Got it sussed! The two "mystery plugs" (each with 3 wires, shown in the pictures) are for the heated seats!
No wonder I couldn't find a connector for them, the seats are still in the garage
So I just need to leave them "accessible" and when I put the seats back in, those two cables will come in handy
Next weekend... reconnecting the air-con
M.
Edit: Dec - yeah, there are a few "sockets" in the car, two in the center console... one with a cigarette lighter bit and one with a "12V 120W" cap on it for in-car-accessories. The loom looks roughly like this:
>Blue + (rear socket)
>Black - (rear socket)
>Red + (front socket)
>Black - (front socket)
>Rice bulb holder connected to the wiring loom (x2)
>Switch connectors (x2; 1 for the suspension stiffness and 1 for the rear fan)
>Daisy chain connectors (x2; both go to the rear passenger control board for rear climate control and lights)
>Heated seats connectors (x2; the black ones in the pictures)
M.
EDIT 2: Anyone want to go out for dinner? I got caught removing the rear part of the center console from the dishwasher, and I have a feeling making myself scarce for dinner is a good idea