At 1004, a control processor determines whether {HEAD ~ the batteries} are connected in series or in {TAIL ~ parallel} 
At 1004 , a control processor determines whether { HEAD ~ the batteries } are connected in series or in { TAIL ~ parallel }
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL