Jeff, on the right hand frame of the tractor is a large round plug. That is the belt pulley plug. It is a part of the hydrolic (sp) resivour (sp) that is integral to transmission/pto/rear end. The only thing is if you fill the pto/hydrolic resievour up it will drain into the rear end through the roller bearing for the splined shaft. If you have a AC service manual not an I&T it will show a lot better what I am talking about.
PS. Wish I had my service manual here at the house and I would scan the pic's in and show you but they are at the house at the farm.