I have an Aegis Trident that has internal cable for rear brake. Like Ex Pres says, the fun part is getting a cable through to guide the housing. I put a long cable into the rear hole, and worked it out the front hole with a spring hook (you can make up something similar with a paper clip). Then I ran the housing over the cable, and got it through. I added ferules to the ends of the housing after cutting to length.