Updated Cable Chain End-Stopper-Mount for CTC / Flashforge / Replicator

I edited the mount for the cable on the x-axis stepper motor.
Befor I couldn't install this fan duct properly:
http://www.thingiverse.com/thing:537918

The extruder-carrier (better: the fun duct) 'crashed' into the stepper-motor-housing preventing the carrier to reach the end-stop.