Optical fibers are held and aligned by means of {HEAD ~ a base member} and {TAIL ~ a cover} 
Optical fibers are held and aligned by means of { HEAD ~ a base member } and { TAIL ~ a cover }
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH TAIL TAIL TAIL TAIL TAIL TAIL