Finally order behind the hi-fi rack! I have one of this set of 3 2x8 and the 8x8 set of 2 used to finally relocate times all cables tidy. The sticking with me on thin plywood back of the shelf. As has also none solved if I have several cable inserted.
Inserting slightly thicker cable was a bit difficult, I then first insert the cable and only then glued the Cablox what went easier.