The edges of the body wings have counterbored through-holes, which match up with each other and with holes in the through neck, too. Long threaded rods, nuts and washers, pass through the wings and neck, and are tightened to securely clamp the three pieces together. A chromed cap is then pressed into the four holes in the body side to hide the fasteners. Very basic and effective, and no small part of the primitive charm of this early Combo!
Here the threaded rods have been loosened and withdrawn, allowing the pieces to be separated. Note the holes passing through the neck, too.