The fuel selector valve mounts just in front of the main spar along the fuselage center line. Note that the mount is slightly angled to make the valve parallel to the handle that mounts in the center console. Provided you build everything precise the fuel selector and the fuel selector valve hande will align. We suggest that you also read section 14:G:1 to get a better idea of how the parts align. Prior to permanently mounting the valve it is a good idea to fit the center console to verify the alignment of the valve to the handle.