Taskmaster 426e rear axle fluid drain/fill location

[Baxterdmutt]

Hi all. This is my first post here. I recently replaced all the hydraulic fluids in this tractor, except the rear axle. I think I found the drain but can’t find a fill. Does it get the fluid from the same place as the main gearbox or is it separate. If it’s the same then I guess I already replaced it!