Okay, i just finish installing my JDM b16a SiR II motor in my 92 Honda Civic hatchback CX. And i'm using the CX engine harness for the swap. Heard i suppose to use 92-95 Si engine harness though. But anyways, Since the JDM b16a SiR II has four wires for the O2 sensor. Where does each of them go. Well, i know 2 of them leads to the ECU. But where does the other two wire leads to? I think the other two is heater wires. But where do they go?