Customizable plug strip holder for shelf (screwless)

This is a second item that goes for my desk organization mission...
As with the cable, I wanted to get everything (or almost) away from the desk. This is to hang the power strip (plug strip or how you call it), just under the shelf where my cables are arranged.
This way I have nothing to screw to the shelf, everything can be removed just sliding out the shelf board...
Some cable ties in the right places will arrange the cables quite neatly and on the desk just the computer and monitor...wire