Depending upon where the female slots 407,408 are located, {HEAD ~ various housing elements} will provide {TAIL ~ separation} between the slots 407,408 
provide
Depending upon where the female slots 407,408 are located , { HEAD ~ various housing elements } will provide { TAIL ~ separation } between the slots 407,408
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH