Mount for getDigital USB 2.0 7-port hub

I bought this awesome USB hub from getDigital.de but it sadly lacks some mounting holes to screw it to my desk. So I desigend a pair of caps with such holes.

It is designed to take four 4mm wood screws.

The hub can be found here: https://www.getdigital.de/Ultimate-Hub-7-fach-USB.html