4spd. console side cover install

I have a 68 Barracuda 4spd w/console and I`m attempting to install the side cover that hides the exposed part of the lower boot. What`s the deal with this thing,do I carpet the console first then attach it to the side, and carpet it separately? Do I attach it to the console then try to carpet it all? What is the screw hole in the top of it for? Someone out there must have one, or remember this cover. My 69 Dart had one made of a thick paper or something but that was 30 yrs. ago ,and I have no clue now how that thing was installed.Is anybody familiar with the cover I`m referring to?