Are you trying to adapt a road caliper to that wheel and fork? If so you are likely to have many more issues besides cable pull. First off you need to know if that fork was designed for a road caliper brake. The hole in the fork crown may only be designed for a reflector, cable hanger...

As is I'd be surprised if the arms on a road caliper would reach the braking surfaces on that wheel.

Why do you want the change?