What can you tell me about these pictures? (Radius Arm Ball)

[Curly]

I was under my truck the other day greasing it when I noticed one of the two bolts on the radius arm ball was loose. After I tightened it up (about 1X16 of an inch) I got thinking that I needed to learn more about the radius arm and this ball connection. Yesterday I spent some time on the Ford Barn reading old posts and recommendations. Given what I have read I’m thinking my car has the rubber ball conversion. Can this be determined by looking at these pictures or do I need to open it up? I don’t think this cap should be locked together like it is… am I wrong? Any advice on this would be helpful. By the way, I have not driven it since tightening the bolt, but there were no sounds or clattering before.