Thanks AdrianC
answered the query and then some...
The speedo cable wasnt being replaced, but I'd had the steering knuckles apart to do top and bottom joints, discs, bearings, pads, splash guards etc. For the life of me, when putting the metal cap back on I couldnt get the cable to poke through! Sorted now, cleaned out the square hole with a needle file, then tried it for size the 'wrong way around' before knocking cap back on, cable poked through, grabbed with pliers, circlip replaced, sealant added... all good.
Its been a long few days work and I think Ive all but had enough today! New day tomorrow
Thanks again. FW