The left wrist stays flat but rotates over in a counterclockwise fashion. It as if you had some change in your left hand that you were passing to somebody to the left of you. You would need to open up your palm to them to give them the change as the left elbow folds up. If your left elbow disconnects from your left side, it prevents or blocks the rotation of the left arm, hence you block your shots to the right. To get a better feel for this, place your right hand over your left bicep, then swing the club back and through. You should feel the left elbow fold up.