There are 10 singal wires, if you make 4S battery pack, you can just connect 4 wires. 
					
						It max can make 10S battery pack.
					
						 
					
						this board can use as  4S/20A,  5S/20A, 6S/20A, 7S/20A, 8S/20A, 9S/20A, 10S/20A PCM.
					
						 
					
						4S/20A    charge voltage is 4.2V*4=16.8V
					
						5S/20A    charge voltage is 4.2V*5=21V
					
						6S/20A    charge voltage is 4.2V*6=25.2V
					
						7S/20A    charge voltage is 4.2V*7=29.4V
					
						8S/20A    charge voltage is 4.2V*8=33.6V
					
						9S/20A    charge voltage is 4.2V*9=37.8V
					
						10S/20A   charge voltage is 4.2V*10=42V
					
						 
					
						 
					
						Note:
					
						There are two connections ways :
					
						1) Charge/discharge with different ports:
					
						 
					
						"P-" is the discharge negative end,"P+"is the discharge positive end.
					
						 
					
						" C-" is the charge negative end,   "P+" is the charge positive end.
					
						Charge current is 10A;Discharge current is 20A.
					
						 
					
						2) Charge/discharge with the same ports:
					
						 
					
						" C- " is the charge/discharge negative end.
					
						 
					
						" P+  "is the charge/discharge positive end .
					
						Charge/discharge current is 10A