The method 1, comprising providing audible and visual indication on at least one of the assemblies indicating {HEAD ~ successful exchange} of {TAIL ~ the pairing information} 
of
The method 1 , comprising providing audible and visual indication on at least one of the assemblies indicating { HEAD ~ successful exchange } of { TAIL ~ the pairing information }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL