B Pipe installation , water box hose cut.. ?

[mk1]

Guys , i`m hooking up a b pipe and not sure how much to cut off the hose that joins to it and goes to the stock waterbox . The instructions and diagrams that came with it seem to be for a superjet , not the fx1... Can any of you with a b pipe remember how much you cut off your waterbox pipe when you installed same..? (I don`t want to screw it up.) Thanks...

 

[mk1]

Update... ! I got it sorted , and for future reference the waterbox pipe needs to be cut by 7 inches.