There, are {HEAD ~ assembly} is placed on {TAIL ~ a conveyor} 41 and the connectors are butted against a surface 41a for alignment 
is placed on
There , are { HEAD ~ assembly } is placed on { TAIL ~ a conveyor } 41 and the connectors are butted against a surface 41a for alignment
OTH OTH OTH HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH