Each flap is moved about {HEAD ~ the score line} for {TAIL ~ insertion} through the elongated opening such that when the flap is inserted beyond the free end of the flange, the flap is biased way from the panel to connect the panel to the channel 
for
Each flap is moved about { HEAD ~ the score line } for { TAIL ~ insertion } through the elongated opening such that when the flap is inserted beyond the free end of the flange , the flap is biased way from the panel to connect the panel to the channel
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL 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 OTH OTH OTH