Part positioning {HEAD ~ brackets} 940 have been placed in {TAIL ~ approximately the middle} of each retention channel 915 
placed in
Part positioning { HEAD ~ brackets } 940 have been placed in { TAIL ~ approximately the middle } of each retention channel 915
OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH