How-to Remove Sun visors
The first thing you need to do is to remove the cover plate then undo 3 screws.
Once you've done that you need to give it a good pull downwards,
I couldn't get any pics of the wire as its in the roof lining but if drop the centre courtesy light that will help you find it How-to here
On mine there some tape and the wire for both lights is stuck to that.
How to remove the the Hook.
To remove the hook simply unclip the sun visor
using a small tool open the flap and then undo the screw and pull the hook out.
Astra-J 2.0 CDTI S/S
Retrofitted AFL, TPMS, Navi950, BT, DAB, Rear Camera, Infinity sound system, Towbar, Flexfloor & more.
I can do programming and retrofits using genuine GM MDI and Dealer software.