I've been cleaning up, and consequently having a hard time finding anything at all...
I've just managed to find my Haynes manual, and I strongly suggest you get one. the Neutral switch is located between the sprocket cover and the water pump, very much on the
outside of the left side of the crankcase. Don't know where the folks on those other sites are getting their info, but there's no need to split the cases.
Cheers,
-Kit