Simple USB female ports to store USB drives or storing USB wires when not in use. Each print holds 3 and mounts to the Cooler Master Frame 600 honeycomb spaces. I did not use the standard attachment method because I wanted it to sit securely but also be easy to remove/re-position. 

There are two models: one for the top and front panels and one for the side panel.
Intended print filament is TPU. This will not fit using hard filaments, like PLA, PETG, etc.
100% Infill

Lastly, I used Cooler Master's STEP file(s) to create the pictured template, for testing. I do not own this case. All feedback from MasterFrame 600 owners is very welcome.