Each flap is moved about the score line for 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 {HEAD ~ the panel} to connect the panel to {TAIL ~ the channel} 
Each flap is moved about the score line for 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 { HEAD ~ the panel } to connect the panel to { TAIL ~ the channel }
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 OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL