Thanks Jason and Justin.
Justin, I removed the plastic cover that hides the screw in the centre of the back of the roof consul. It is actually behind the radio :D
There are a few spare leads up in the roof, I used the power and earth lead that goes to the rear sunroof (not fitted) :)
I left the wiring for the front sunroof alone.
The antenna lead runs up the passenger side front pillar and across to the centre. The screw actually fits through that hole!
I undid all the top screws on the passenger side and centre of the consul, to make it easier to push the cable in between roof lining and roof.
It was all quite easy.
Cheers,
Ron

