However, both current sources 47, 49 share the same leads for current return, {HEAD ~ i.e., the leads} depicted as {TAIL ~ columns} in the array 
depicted as
However , both current sources 47 , 49 share the same leads for current return , { HEAD ~ i.e. , the leads } depicted as { TAIL ~ columns } in the array
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH