an outer sealing member extending from {HEAD ~ ends} of the towers and which covers {TAIL ~ the two openings}, and 
an outer sealing member extending from { HEAD ~ ends } of the towers and which covers { TAIL ~ the two openings } , and
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH