If the box gets put on 180 degrees wrong the steering wheel will be upside down.
Should be a small V notch in the outer edge of the coupling that marks the master spline location inside. This needs to be lined up with master spline at steering wheel end of shaft.
If the wheel, etc., is still on the shaft, you can't see master spline that end... Wheel straight ahead, V notch in view through the wheel.
