Oh dear! That looks nasty! I've seen a prop shaft come off and smash a gearbox housing to pieces. A bit bigger than a SJ one though, it was 5 ft long and 6 inches in diameter, now that made a horrible noise. Sounded like £7K being chewed up !
There's three ways of doing things,
1) The Right Way,
2) The Wrong Way
3) My Way.
2 & 3 are usually the same.