A simple magnetically attachable cable roll that's easy to print and place. Included are a design for 5mm and 10mm magnets. I recommend the latter for better magnetic adhesion. The roll is not designed for much force and more to guide a cable that you do not want have to reach for all the time, e.g. a charging cable at a bedside table.

Assembly is quite easy. Align the roll with the hole of the holder and insert a pin. Place the cable on the roll and repeat the process with the second set of roll and pin. The magnets should be inserted at the back prior. I recommend to have the pins not align perfectly with the back, but have like 1 layer line of offset, as this will allow the cable to move more easily.