I have the same problem, trunk cable snapped, where did you buy yours? if you are unsucessful fishing it through I know it sucks but probably removing it and straightning the line out and fishing it through then would work
I replaced mine a few weeks ago. it is just how it looks, run the cable through the firewall and bolt the latch assembly in place, then put the red plastic cap into the latch bracket and pull out the cable (like you would do if the latch was hooked up and you were opening the engine lid). Then rotate the small cyliner around until it fits into the back of the latch itself. If you have any problems hit me up.