Here is the only pic I have of my scope without the shroud covering the clamps, and I needed to crop it quite a bit so I'm sorry for the poor quality.

I didn't like the pin going through the end hole and instead used a washer and nut threaded all the way to the ends of the thread which then sits on the inside of the ring to keep the screw in position. My friend who was helping me out while I was building my scope showed me this and it works great. An added benefit is that I can tighten up the clamp for transport.