Cable support mount for desks with metal frames under the top. This mount alows you to use the existing screw in bolts on the underframe and then zip tie the cables out of sight (Close to the top underside)

Screw in bottom of mine was:
Screw body 5.5mm
Screw head 12mm

Should be close to most desks and at most you might need to upsize by 10% if you had larger screws.

As usual, built this mainly for myself and sharing as it solved my messy cable problem.
Note: That I also have wire loom netting around my cables but thats not needed.
( https://www.amazon.com/gp/product/B07FXF12HC/ )