I can see the confusion with the arrows on the queenpin now. They’re only meant to indicate where the flat spot is on the queenpin in order to more easily line up with the setscrew. They are not meant to indicate baseplate direction.
Reference this photo. See arrow pointing towards front. See extended 5 degree baseplate in the front extending the wheelbase. See both hangers with axle end towards the rear. (Front hanger is that direction to maximize ground clearance. Rear hanger is that direction to maximize motor clearance)