{HEAD ~ The reference junction} is suitably configured for {TAIL ~ connection} to the reference sourcing or sensing unit 
is suitably configured for
{ HEAD ~ The reference junction } is suitably configured for { TAIL ~ connection } to the reference sourcing or sensing unit
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH