I've bell'd my cable through and it is connected exactly the same as the wiring diagram shows it should be here:
http://www.commonsenserc.com/page.ph...po_wiring.html
I think your right there is 1 extra / pointless cable - but is electrically shorted to the same point anyway as its duplicate - so it isn't a problem, its just a doubled up cable. It was easier to make it up that way form the leads I had.
Thanks for the feedback though guys, all very useful.