My take on a cable trunk designed for 3D printing. This allows you to tidy up wiring in your electronics compartment very cheaply. I use it for my Voron V2 printer (http://vorondesign.com/)

Supports are not needed! I printed in ABS for some flex. In PLA, your mileage may vary. PETG should work fine as well.

As can be seen on the pictures, the bottom has pockets for some 1mm thick double sided tape to be applied, this should be sufficient for most appliances. Also there are slots for 5mm bolts to be screwed in, if you wish to use them.

It can also be seen that the sides are slightly angled. This allows for a firm grip of the cap, and it will be quite sturdy.

I added some sizes I thought appropriate. If you need any other size, please message me. Unfortunately I can't autocad this for custom dimensions.