Cable management for computer cables
Here you can find few different clips that help you attach multi socket adapter, power cable and other cables to... the wall (of your desk). Since it is clips, you can always fully detach all cables from the wall when needed.
1.) Three clips for a multi socket adapter (cross section approx. 54mm x 41mm). One of them has 3 smaller clips on it which can hold an 8mm power cables. One also has an end stop to allow vertical mounting onto a wall.
2.) Two wire bundle clips, one with 25mm x 20mm inner opening and another with 35mm x 30mm opening.
3.) Two different wire hangers with 10mm opening that only loosely hold the wires. One is meant to be mounted onto the wall, and the other one, to the side of a desk or lower edge of the desk's back wall.
Screw holes diameter is 4mm (and 8mm counter bore).