Since I built and began using my MK2S, the cables from the extruder have been working their way loose from where they enter the Rambo box at the top. No matter how many times I secured them, the cable wrap would slip it's way up and I could see that the cloth covered wires were showing some wear. The single wire tie was insufficient.
I made a small object that allows using additional wire ties to secure the cables and wrap.
If anyone else is have the same problem, it can be downloaded here https://www.thingiverse.com/thing:2391494