Don't blame the Technical manual, you need a copy of the Operator's Manual # OMT81347 for the type info you are looking for here. Checking and adding oil, and other normal service items usually done by the owner or operator are generally covered in the Operator's Manual, not the Technical Manuals. A dealer's shop would have Operator's Manual and Service/Technical Manuals (The 445E actually has 2 Technical Manuals Volumes, TM1330OP and TM1330RE, required)and a parts catalog as well, normally, for the mechanics to reference.
My 450E uses the same manuals. The right manual has the information. Here is a picture of the page, from my copy of OMT81347, on checking the transmission/steering clutch oil.
