Actually removable cable mounting clip

Great design by @Afrobob222 yet I couldn't place the cover laying flat (as they both should to increase solidity) without supports, plus with the flanges on the side it was not removable, while, like this, you can simply slide it out.
To the same extent, I included a single-flange cover, so you can place it in the direction where it best opposes the possible forces done by the cables, but you can still slide it out on one side.

I also added a chamfer to allow for the use of more type of screws. Or, you can use the original version (which I included) if you don't want the chamfer.