Luggage compartment protective blanket XC90

Hello together, …. for three days now the moose is finally (!) in front of the garage (because it doesn’t fit in ) and I’m thrilled! But more on occasion in the presentation thread… We have two dogs and therefore I got the original Volvo coffee room ceiling. Go up nice on the side and if necessary you can open the cut-out where the middle seat of the 2nd row is by zipper and use it to load through. Now I open the package and get the ceiling ‘out – nice with push buttons to fix it. Unfortunately in the trunk there are no counterpieces for the push buttons, but obviously you have to screw the enclosed parts into the rear side walls of the suitcase and the rear seats ??? Too bad i own it, because I wanted to do exactly the opposite with the ceiling and keep the “original condition” at least to some extent has one of you already installed this ceiling (or the push buttons) in the XC-90?