Okay, :welcome: to iboars Railpin. Great to have you aboard....
While I have zero knowledge of your engine, and I don't see many others chiming in as well. Maybe you could post a picture or three of your unique engine s we can see what you are dealing with.
I looked up the engine and did see a picture and it looks like on the starboard side there is a hole. I am only guessing that hole is there to either adjust something or to help remove the cowling. There is also a screw on the front that has to be removed as well. And of course the handles have to be removed to allow the cowling to be removed from what I see. JMHO