{HEAD ~ Power takeoff} to {TAIL ~ a transmitter} mounted in the housing is by conventional slip rings 
to
{ HEAD ~ Power takeoff } to { TAIL ~ a transmitter } mounted in the housing is by conventional slip rings
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH