I don't know a lot about cinqs but how about through the door trim at the bottom of the door and through to the boot under the rear seats? Or are you stuck with getting it through from the engine bay?
Yeh im stuck when it comes to getting it from the engine bay to inside the car. i no i can run it out through the door and under the bonnet there but dont really want to do that
Hmmm, I'm afraid I don't know much about cinqs. I'm sure someone will be able to tell you where there is a grommet or suitable opening in the engine bay you can run the cable into and under the dash, sorry I can't help you mate
iirc there's a grommet behind the battery tray which comes out by the steering wheel. remove engine bay carpet on the drivers side and you should be able to see where I mean (it's where the speedo cable goes through)