Doug,
from memory the wires pas up through rudder head over a couple of pulleys, the down haul sits in a groove on the leading edge of the blade, they then enter hull passing over 2 metal pieces that look like cotton reels then pasing through a couple of turning blocks (mounted on hog?) upto another couple of blocks top of stern which allow you to lead them forward under deckhead to emerge through cockpit bulkhead. However I never found the system to work well due to friction, perhaps this could be helped by thinning the rudder blade where it enters the stock slightly something I never bothered with as I didn’t need to adjust the blade once it was down. When you fit the blade make sure it’s the right way round as if not you’ll have a very heavy helm also ensure it’s fully down when sailing for the same reason.
Dom