I was thinking it could be printed, but now I look again there is no endstop in the braze on so all the pull is going to be on the tiny little edge of the ferrule.
you have 2 options here.
1. run a full cable as already suggested by Dree
2. fit adjusters in to move the point of stress to a better place.
I suspect that even with those ferrules you are showing, you will pull though in relatively short order.