ok so i was lookng at the wall on the dio and was no happy with the idea i see Cardboard so i took this one step further
i picked up some wall Compound from Wally World for like 2.49 and went to town adding the spackle to the wall smoothing it out and i also cut two holes in it before i started
Enlarge this imageReduce this image
Enlarge this imageReduce this image
after i got an even coverage and smoothed it out i wanted the Wall to have texture so i took a paintbrush and just stippled it lightly to pull a little of the spackle out do this over the entire wal piece front and back
Enlarge this imageReduce this image
ok so when a hole gets blown into concrete what do you see??? Rebar right its the metal that makes wall durable
so taking some wire i have (welding wire) or you can use a paper clip i trim some small pieces off and placed them into the coragated part of the cardboard when the spackle dries it will hold these in place
Enlarge this imageReduce this image 
__.___.—..··.-..__.___.—..__._.—.