Note that on the K46 there is a single filler for the hydraulic system and the mechanical part of the transmission, but the two lots of identical fluid are kept separate inside the transmission. Did you find a total of nearly 2 litres of very light engine oil in the transmission?
How can the two lots of identical fluid be kept seperate if you fill them from the one filler, surely the fluid must flow between the two to keep the levels equal.
I filled it from number 7 in the photo from your first post.
Moderator edit: I have replaced the original illustration with a different one. The oil filler cap is number 15 in the new one.
I have taken lots of pics but have to wait till my new internet package arrives next, I hope.
Rich