I'm probably just over thinking this, but the installation instruction for the Garmin AHRS unit says Mount the GSU 25 with the connectors aligned within 1.0 degree of either the longitudinal orlateral axis of the aircraft.

Does this mean it has to be installed along the center of the fuselage within a degree? Or could it be offset, just aligned parallel and/or perpendicular to the center line (longitudinal) within that 1 degree?