I just got a brand new S-AFC 2.  I read all the instructions.  My question is about the RPM signal.  I notice there are 2 on the ECU.  On the APEXi diagram, there is only 1 wire connected.  Which one connects to the S-AFC 2. Is it RPM1, RPM2 or both?  Thanx in advance.
			
			 
				
		 
 
		 
 
		