A connector element may be attached in {TAIL ~ the usual manner} to {HEAD ~ an adapter rod} projecting from a block element 
A connector element may be attached in { TAIL ~ the usual manner } to { HEAD ~ an adapter rod } projecting from a block element
OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH