I printed this on my MK3S+ using .4mm nozzle-X with PLA.
I recommend using .1 or .2 detail printing for the clip system to work cleanly and having a good quality finish for the cable holder.
Current cable length configured on the side pieces is 215mm, this can be adjusted, I will also include a f3d file soon with all parameters detailed for easy scaling.
The author hasn't provided the model origin yet.