yes detail32 and shape are empties, and your model can be named whatever.
Make the collision box a cube still, because that won't affect the meshes physics with the surroundings, only for you which means the ball will roll around and everything, based on what the shape is like.
I guess you could make the collision a very low poly sphere but from all the things I read about collision meshes, people suggest you stick with a cube or a cone.