Very easy to do, can even do it without removing clocks totally, I would take out screws etc holding the clocks, then squeeze the conencdtor on the rear where it(clip) is serated this will allow you to pull from the clocks, now under bonnet pull through bulkhead, remember the route then disconnect at box end, with circlip pliers etc, refit in reverse order, nothing difficult to catch you out on this job, just make sure the cable inner is in at least 1/4" or so into the drive bit, some can be a tad short, and jump out the drive pinion.
tabetha