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