{TAIL ~ each container electronics} and {HEAD ~ the first box control electronics} are housed within the first temperature side of the first freezer 
{ TAIL ~ each container electronics } and { HEAD ~ the first box control electronics } are housed within the first temperature side of the first freezer
TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH