sorry if this "is in the wrong section", "Has any spelling mistakes or bad grammer", "is a stupid question", right...

Iz thr an eezy way ov feeding a wire from da pilla 2 da door thru da rubba grommit ting?

Sorry couldn't resist . Serious question though

 

Pull an existing cable out with a draw wire attached then pull the original an new wire back through attached to the draw wire.

Hope that makes sense and don't blame me if it doesn't work

 

Thank you.. Never even crossed my mind, was trying force it through for ages before giving up lol