You're right about the loader, that was on the TS354C. But I also had a PTO-driven hydraulic pump and PTO safety shield on the KM454, so yours looks a bit barren compared to mine. I should have looked at my own photos first, that location I have you above must have been from one of my Jinmas. So from what I see, it's apparent that you'll have to drain via the filter housing. While we're on the topic, among my KM454 spares is a spare magnetic filter frame and lots of 80x80 brass mesh to wrap around it.
The site PM system is a bit awkward for a spare parts discussion (the list is long), but you could PM to me your regular email address. Once I have that, we can go from there.
//greg//