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