A power consumer or collector 49 , for example, {HEAD ~ a fan blower} or an onboard battery, is connected electrically via electrical cables 50 to {TAIL ~ the roof side contacts} 42 
is connected electrically to
A power consumer or collector 49 , for example , { HEAD ~ a fan blower } or an onboard battery , is connected electrically via electrical cables 50 to { TAIL ~ the roof side contacts } 42
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH REL REL REL OTH OTH OTH OTH REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH