Simple cable clips. Scale in slicer to achieve desired size. suggested range is from 50% to 300%.
Suggested material for printing is TPU although PLA is also a great choice, especially if your budget is constrained, or dont want the hassle of messing with TPU.

These are intended to have some flex for larger cables to fit in. If printing from a rigid material, i'd recommend scaling up by a little bit

Very minimal material is used - perfect for using up the remaining bit of filament