Custom external USB port for backpacks that don't already come with one. A normal USB-A female from old electronics will fit and I used an aliexpress USB-C female port with power and data soldering pads, also can have the cc pad soldered in order to make it USB-C pd compatible.

BOM:

• x6 M2 6-8mm
• x4 M3 8mm

Internal whole made for 3.5mm thick cable.

No supports needed for all parts expect for USB-C adapter which may need depending on slicing settings.