Easter
If you take a look at the video at 1minute 25 they have some drawings, may not be correct but gives some ideas of the set uo.
I couldn't see prop shaft on that video. As I see it the H-D m/cycle has a chain primary drive[drive from engine to clutch] so engine spins 'forward' [on m/cycles with gear primary engine spins 'backwards'] - so on Mog trike engine will spin anti/clockwise if viewed from drivers seat, therefore prop must connect to wheel on right hand side to propel car forwards, or I am missing something obvious?