The KP3S Pro really needs a strain relief, and the model made by LMaker is really good. It sticks out a little too far behind the bed for my use case though (my printer cabinet is very small), so I made a version that angles the cable 90 degrees towards the cantilever profile.
In order to make sure that the cable collector doesn't stick out too much towards the back either, I used a slightly longer M3 screw, with a nut in the end, for one side of the cover and tightened down the cable collector against this with a zip tie (see photo).
Printed in PLA with 0.3 mm layer height, 100% infill and later “annealed” to make it more temperature resistant (can withstand 110+ degrees C without issue).
The author remixed this model.