Put the perch and lever on the bike and rig up the cable snake the cable along the frame and place one zip tie along the side of the frame where the plastics seprerate the front and rear to hold the line secure
Try to keep the slack to a minumum and you are going to make a loop with the cable and use the cable crimps to keep it looped. This can be tricky because you need to make sure there isn’t to much slack in the cable cause if there is you will have no pulling power.
Take the metal hose clamp and secure the cable to the swing arm make sure the clamp is very tight so the cable doesn’t move. The clamp must go on the swing arm, if it is not on the swing arm when you sit down and compress the shock it will cause slack in the brake cable and it won’t work.
Note: it takes some playing around with to get it to pull hard. Don’t expect it to be as good as the rear brake pedal but it will definetly work in slowing you down in turns and bringing you down off of wheelies so you don’t fall