The mounting brackets 1A, 1B are temporarily held in position by friction provoked by {HEAD ~ the resiliency} of the flexible tongues and {TAIL ~ arms} helped by the relevant first, second, third and fourth detent projections 71, 73, 75 and 77 
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The mounting brackets 1A , 1B are temporarily held in position by friction provoked by { HEAD ~ the resiliency } of the flexible tongues and { TAIL ~ arms } helped by the relevant first , second , third and fourth detent projections 71 , 73 , 75 and 77
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH 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