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