I have since created a better model with hidden mounting, see:
https://www.printables.com/model/1290365-type2-cable-connector-bracket-with-hidden-mounting
I got fed up with all variants that had different latches and stuff to hook into the cable.
I designed a simple one where the weight of the cable effectively locks the cable in place. You just lift it slightly before pulling it out in order to unlock it from the bracket.
It is also slightly oversize to make insertion and extraction simple.
The author marked this model as their own original creation.