Touring rear roof lining removal.

[NigelA]

I need to get behind the roof lining over the rear windows to locate the fixing points for the net which is integral with the load carrier and I need to do that today. Please would any touring and restoration buffs help with this. I have orderd the E30 Restoration Bible (hopefully that is a good move) but it hasn't arrived yet. Hopefully that sort of information is in there because it is not in the Bentley manual.