I have never been a fan of the cargo net being installed in the trunk opening, on my last car I moved it to one side of the trunk. I could never find a nice way to mount on the side of the cruze, but found the perfect spot that is easy to access from the back seat.
This is actually the cargo net from my 2004 cavalier(J-body 1994-2005) which is the same as a sunfire. Not sure of the cruze cargo net size but suspect it would be possible to mount similarly.
I just used a small piece of black paracord to tie bottom corners to the metal loops that are hidden by the carpet here. The upper corners I used the plastic Ts that came with my other car. I will try to get some pictures of the mounting points if anyone would like.