The locking clip 36 and has {HEAD ~ a pawl} 37 which engages {TAIL ~ a lower surface} of the circuit board 12 
engages
The locking clip 36 and has { HEAD ~ a pawl } 37 which engages { TAIL ~ a lower surface } of the circuit board 12
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH