Swing drive gearbox. How do you drain the oil?
If you look down at your gearbox you should see a pipe that protrudes at the bottom which I believe is on the engine side of the gearbox. The end of that pipe turns down into a hole which you drain from underneath. The hole underneath is just in front of the access hole for the engine just about up against the swing bearing.
Yes the pipe is towards the engine side with elbow on it.