Can you get all of the model numbers off of the tractor? Most of the time there will be belts guides where the belt is designed to ride.
Will this picture help you?
I found another picture that I think will help you. Look at this picture and you will see #8 is a belt guide. Look on the tractor at the guide and you should be able to tell where the belt goes. It is a double guide so each side of the belt go is one part of the guide. You should be able to tell by looking at it whether or not you have to remove the steering wheel.