rear end oil check

[country guy]

I have a torro wheel horse 17-44 HXL and I want to know just where I would check the oil in the rear end and what type oil I would need for it.

 

[deck~dragger]

Hydrostatic transaxle -https://www.toro.com/en/parts/partdetails/?id=25469

"Could" be a maintenance free unit unless leaking or other.