Case Modification View 31 TG
Motherboard Mounting Backplate/Cable Management Shroud Cover
1. 18” x 19” x 3/16” foam posterboard
2. X-Acto knife
3. Carpenter Square
Case manufacturers don’t have any clue what you are doing with your case and they make holes for everything. A quick and easy way to cover these holes is to make a cut out the shape that you need and then mounted to the back of your case.
Leave a gap between the foam board and the case to allow for other wires to be hidden and only bring through what wires you want to show. In particular, the 24 pin motherboard custom cable my for doing and the same for the GPU which is going to be mounted vertically.
Foam posterboard computer modification cost around 3 bucks. you can also use acrylic which is about $12 for the same piece and paint it as well. Acrylic is a lot harder to work with and for this application, I believe the posterboard is just fine.