Side window retention means firmly but flexibly grasp the edge portions of each side window and thereby utilize {HEAD ~ the windows} as {TAIL ~ structural members} to add strength to the showcase 
as
Side window retention means firmly but flexibly grasp the edge portions of each side window and thereby utilize { HEAD ~ the windows } as { TAIL ~ structural members } to add strength to the showcase
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH