Once you remove the C clips in the tunnel which hold the cable outers in place, the cables will pull back towards the engine until the inner cable is showing. This inner will then easily slide along to the central hole.
You then feed each outer in turn into the tunnel, and the whole lot pops out for easy working in a vice.
You need to undo from the horseshoe the spring from threaded bar to back hole, and both 1/2" nuts, to detach the bar/cable which comes from the reaction bar in the front plenum chamber.
Alex in Norfolk.