Yeah I was worried that the 3-pin wasnt the right way to go.
There are 2-pin versions as well but I was thinking the 2-pin ones are simply made without an earth pin.
I have a mate who's real good with auto elec stuff so he'll suss it out for me tomorrow and if all else fails, I'll take it to the bike mechanic to sort out.
That'd be a shame thou! It's so much better to rig up these projects yourself!
Will post as I find more..
(Woot, uncharted territory!
)