{TAIL ~ A warning device} is operatively connected to {HEAD ~ the switching device} and responds when the switching device is actuated 
{ TAIL ~ A warning device } is operatively connected to { HEAD ~ the switching device } and responds when the switching device is actuated
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH