Silverstone Arm14 - deeper cable channel

WIP: The connectors aren't strong enough and break with PLA, so this isn't really strong enough. You might have better luck with another material.

The cable clamp that comes with the upper part of the arm isn't deep enough to put 5+ cables through. This makes it deeper so it can.

This is for those who are kitted out as the standard cable channel will fit most users.

Made for the Silverstone ARM14 monitor arm.
https://www.silverstonetek.com/en/product/info/accessories/arm14/