This is a quick shelf I whipped together for my Amazon Fire TV Cube. My TV is wallmounted and floating without any cables visible, so this is my compromise to make the thing look better.

Cable slots come out the bottom, but can be routed out the top.

I am also using a 90 deg HDMI adapter that sends the cable downward. You could also use a 270 deg adapter as well and go up.

Solidpart attached, feel free to change as needed.

Possible REMIX: 1-2mm more space in back (relieve some bend/stress on the powercable) Add a 270 deg adapter and a flat 90 deg to put hdmi through the side by the TV, move shelf adjacent to TV = eliminate visible wires.

Printed in PLA @ 200 on Hypercube Evolution.