i'm assuming he has routed under the steering wheel
to do this you need to remove the trim - start by removing the fuse panel and cover on the drivers side of the dash (open the door)
then remove 2 x Torx 10 screws and then pull the trim out and away
then remove 5/7 other screws to allow you to remove thre trim behind that giving you plenty of room
here's a pic of under the steering wheel

to remove the ashtray pull out the bit in the ashtray to reveal a screw and remove that
now grab inside the ashtray and pull up towards you - don't pull to hard as you have to disconnect the plug for the lighter behind
you might have to remove the headunit too - not 100% sure but removing the above should allow enough room to route the cable upto your location