In the cross sectional view of the housing 1 in FIG 4, {HEAD ~ the first gripping members} 4,5,6 protruding from {TAIL ~ the interior surface} 21 of the top portion 7 and the second gripping members 9,10,11 protruding from the interior surface 22 of the bottom portion 8 of the housing are directly opposite one another 
In the cross sectional view of the housing 1 in FIG 4 , { HEAD ~ the first gripping members } 4,5,6 protruding from { TAIL ~ the interior surface } 21 of the top portion 7 and the second gripping members 9,10,11 protruding from the interior surface 22 of the bottom portion 8 of the housing are directly opposite one another
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH