if its the same as the valver then i'm in the process of fitting my o/s handbrake cable
basically you need to unhook the cable from the lever at the back of the caliper, then knock the sleeve out that goes through the bracket in the caliper, iirc it needs to come out from back to front of the car if you understand that? (mine would not move but as i was replacing the caliper anyway due to a snapped bleed nipple i cut the cable off lol) then find where it comes out of the trailing arm and pull it through
then unbolt the exhaust heat shield and unhook the other end of the cable, it then goes through a grommet in a piece of box section, i havent sussed how to get mine out of there as yet as it seems stuck fast lol
buy yourself a haynes manual mate, can save alot of hassle
once i've done mine i will be able to help a bit more