The first and third pictures show a plate mounted on the head stock. Material can be turned between centers with the use of lathe dogs and this plate. There is an inspection plate on top and both ends are bolted on. Why not just pull it apart and see how it's built instead of all of this guessing? That would have been the first thing I had done the moment I got it but then I'm the type of person who takes everything apart to see how it works.
Dick
I took it apart last night. It was a solid bar from the pulley side to the point on the dead center. Sorry, shoulda updated. Originally I didnt want to tear it apart for fear I might not get it back together