A third one of the outlets/intakes of the connector communicates with {HEAD ~ the cavity} of {TAIL ~ the hose} 
of
A third one of the outlets / intakes of the connector communicates with { HEAD ~ the cavity } of { TAIL ~ the hose }
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