Rear wheel drive train/hub oil ?

[rodent64]

I looked through the online owners manual about maintenance on the 400 GT. I see nothing about the rear hub/drive gears lubrication. The engine and rear hub are separate on every make of scooter I’ve seen. Does the C 400 GT utilize engine oil to lubricate these gears/bearings for the rear wheel?

 

[rodent64]

I looked at a C 400 GT parts microfiche and could not find anything out of the ordinary, but it was a small picture. However in the same picture with the engine/trans case, off to the side showed the BMW recommended Advance engine oil -AND- a qt bottle of BMW synthetic OSP XO ( 75w-90) full synthetic PAO (grade 5) GL-5 oil. So it’s gotta be back there some where. Since I don’t have my new 400 GT yet, I can’t look to see. Just an old guy, inquiring minds want to know !. If you could maybe snap a pick of the transmission case left side ( from the rear) and show the fill plug if you please. Thanks