You can get the parts diagram at
www.kubota.com
Click on illustrated parts list, click I accept, type in B348-7 for the model number.
Looked on it, and it doesn't show the map for how the belt is run.
Checked
www.messicks.com and looked at there illustrated parts list. Better picture, but no road map.
Did a Google search and couldn't find the owners manual for it. By the way, if you do a Google search, the pdf ones are bogus.