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