The adapter engages the light box and defines {HEAD ~ an interior cavity} to receive {TAIL ~ a ferruled fiber optic cable} 
to receive
The adapter engages the light box and defines { HEAD ~ an interior cavity } to receive { TAIL ~ a ferruled fiber optic cable }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL