regarding the no-rez and the bolts / nuts that holod the modules in place.
The center of each bolt hole is 19mm in from the side panle and 27.5 mm in from the front or rear edge. Whenther you do your no rez with butt joints or miter it, the bolts will be hidden by the no-rez on the side panel once it is installed.
You can either drill a hole in the location or you can just notch the hard damping layer . Try and leave the foam above so it meets up properly withthe foam on the said panel. I just snipped this out quickly with some side cutters for pics , could have been eater LOL
Here it is flipped with the bolts installed
And after the side panel no-rez is in place
Bolts are a nice hex cap with nylon locknuts