The other of the pair of {HEAD ~ apertures} to cooperate with the output end of the rotary shaft to form {TAIL ~ a second connection} 
The other of the pair of { HEAD ~ apertures } to cooperate with the output end of the rotary shaft to form { TAIL ~ a second connection }
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL