{TAIL ~ The J shaped end} of the second shield is of {HEAD ~ a complementary configuration} receivable slidably within the first J shaped end 
{ TAIL ~ The J shaped end } of the second shield is of { HEAD ~ a complementary configuration } receivable slidably within the first J shaped end
TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH