In practicing this method, {HEAD ~ the at least one end frame} is positioned {TAIL ~ adjacent the cover}, and the interconnecting means are respectively associated with each other 
In practicing this method , { HEAD ~ the at least one end frame } is positioned { TAIL ~ adjacent the cover } , and the interconnecting means are respectively associated with each other
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH