There are several ways you can attach the mounting plates to your Z hood. If you utilize the hardware I supply, this is the way I do it. It's not necessarily "the best way," just "one way." Feel free to modify steps as you see fit.
Like your Z, this site is always underconstruction. :-)
These doors were designed to reduce weight compared to the stock doors. They are available in two configurations: 1) with a full inner fiberglass panel having integral arm rests, and 2) with a perimeter frame designed to allow the door to be left hollow.