you see picture 2? you want the dot above that a little. at say between 2-3 o' clock (you are at 3-4 o' clock). you must then have the engine horizontal and you will be able to spin the output separate from the input.
dot at 3 o' clock.
stand engine vertically
spin input shaft one way
spin output shaft the other way
you are in neutral
now fit the star with the neutral and 'wheel' together.