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