1800: GearBox and Wiring Questions

[andrew111]

I am restoring a 1965 P1800S project car that came in bits - so am having trouble identifying certain bits and where they go.

Two questions:-
1. There is a wire travelling down through the steering column - where does it go after the steering coupling and what does it connect to?

2. The gear-lever extension part of the gearbox is about 50% full of oil. Is this correct or has the previous owner perhaps filled it to keep it serviceable whilst the car was laid up over the last 5 years? The only instructions I can see in the manuals are to fill the gearbox up to the plug level on the side. Nothing about the extension housing on top (and at the rear) of the gearbox.

Thanks