Where is an Eagle's Elbow?

Raptor anatomy is something we love talking about, but sometimes a little difficult to show with our education birds.  Here is a photo of Maxime at a Raptor Release event; she was sunning/drying out after a dip in her bath pan.  Her wrist (marked with a 1), elbow (2), and shoulder (3) are marked with arrows.  The other photo is showing her wrist, when she is perched.