In one position, {HEAD ~ the motor circuit} uses {TAIL ~ only the poles} 47a, 47c 
uses
In one position , { HEAD ~ the motor circuit } uses { TAIL ~ only the poles } 47a , 47c
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH