handbrake woes

[smithy]

i have a disc brake rear end from a commodore in my FC sedan but i cannot get the handbake cable to match up,  i have tried using as suggested an EH intermittent cable (between the front and the rear) but that still needs cutting down and somehow attaching to the commodore rear.
i wish to retain the hanbrake in its original position as i will still be using the bench seat in the front has anyone else encountered or overcome this problem???
thanks
dean