Not having found any good cable guides that were compatible NBRs Modder Board, I decided to take it upon myself to make one that I would personally like to use.
I printed mine in PLA with a 0.4mm nozzle, 0.2mm layer height, no supports. Lower layer height or variable layer height may result in better quality of the curve as there are a few minor places that border overhanging, but it won't affect functionality of the model.
The model uses 2 M4x6 screws (similar sizes like M4x5 can most likely be used too) to screw into a heat insert or a nut on the other side of the board. I personally use a custom front plate that has heatset inserts, which I may upload later.
Installation process may be a bit challenging with the cable clips as you most likely have to put it on one side first (I personally have removed the cable clips). I found it easier to place the cable into the guide first, measuring rough length to the connector, and then install the model together with the cable instead of installing the model first and then trying to attach the cable.
The author marked this model as their own original creation.