[roadracer311]

Probably too late for this input, but you snap the green thing in place, then set the cables to match the position of the shifter while it's being held by the green thing. Really, you just want the shifter to be able to reach all of the gear positions without contacting anything surrounding the shifter. For example, if the shifter is hitting the housing when you shift into 2nd, then you may not be getting it all the way into 2nd before you let out the clutch.