Final answer:
The greater tuberosity of the humerus should be fixed lateral to the articular surface.
Step-by-step explanation:
The greater tuberosity of the humerus should be fixed lateral to the articular surface of the humeral head. It is located on the lateral side of the proximal humerus and serves as an attachment site for muscles that act across the shoulder joint. This positioning allows for the proper movement and stability of the shoulder joint.