Source Fusion 360 files included so you can remix or modify.
Right side stores accessories and is elevated so lid captures items. Should be enough room to hold a pair of headphones on top of the morserino.
For the morserino captures, I used an M3 x 10mm screw thread-formed directly into the plastic below. 2 M3 washers per tab to separate the tab from the screw to mitigate loosening (probably not super effective).
I printed in PETG.
The square hole holds this paddle mount: https://www.printables.com/model/668076-morserino-32-capacitive-paddle-wedge
The author marked this model as their own original creation.