I was off a year with those pics, MT :doh: Your motor doesn't have the front and back support brackets. Without the support brackets, the cowl has to be mounted directly to the block or some part on the block.
I looked through the right parts diagrams for your motor and noticed the block cover that the spark plugs go through has two lugs above the top plug. Look there when you get it on the new stand and see if there are some screws or nuts/studs up into the top cowl. If that's the case, probably something similar around the magneto and starter for some front screws or nuts/studs.
Looked a little more and fount the front mounting. Forward of the magneto mount area is a hole with a bushing, hard to see in this small snip,but by the red mark. The bushing is called a "
BUSHING, CRANKCASE - COWL MOUNTING STUD ". It looks a lot like the one above the block cover in the previous pic, but the name isn't in the parts list for some reason.
The starter area probably has a bushing, too. So there should be two in the front and two in the rear.