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