A bracket to hold a multi-way adapter nicely under the desk.  At an angle for ease of access.

Distanced enough to allow those awkward inverted plugs room to plug in.

Specifically modelled around a masterplug adapter but should be simple to create appropriate parts to subtract from the main bracket design.

Fork the original here on onshape - 

https://cad.onshape.com/documents/dfc00803f88a837feae1dfd8/w/988b79859ba3df62cc0cdd4c/e/7330c40a0dfb051239eebc27