You'll need :
1 x M3x12 screw
1 x M3 T-nut
4 x M2.5x4 screws
The back has a guide to prevent the case from rotating, as it's attached with only one top screw. It also helps to set it up at the lowest position on the frame.
I modified the top case to match the M2.5x4 screws I had. I also added a blind hole to increase the led brightness.
Step files added to allow other remixes.
Thanks to Marius for his nice work !!!
The author remixed this model.