Hi!
Recently I found a cargo net, a leftover from my previous gen Civic, so I decided to install it. After examining the boot, I decided to put it just behind the rear seats, since there is the biggest distance between walls.
I just needed to remove the panels on the front side to get behind to insert screws.
Pics:
Seats folded down:
Also, a *.pdf of original instructions.
Enjoy, Andrej