It's either the top or bottom one you need (well it has to be one of them
). Lets say its the top, (it'll be obvious when you see it) you need to put the Sv top bolt into the bottom of the ZX shock and put a new bolt into the top of the ZX shock. I think I have to correct bolt at home if you want it? AFAIK zx6 and zx10 shocks roughly the same to fit.