{HEAD ~ The plug in assembly} 28 shown in FIG 2 comprises {TAIL ~ a plug pin} 30 formed with a central longitudinal hole 32, which is illustrated only by way of indication, for holding the optical conductor end 20 
comprises
{ HEAD ~ The plug in assembly } 28 shown in FIG 2 comprises { TAIL ~ a plug pin } 30 formed with a central longitudinal hole 32 , which is illustrated only by way of indication , for holding the optical conductor end 20
HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL 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