Hi I bought a 99 civic dx sedan that they recently swapped a y8 into but getting a cel for 2nd o2 sensor because it’s missing(I guess) and trying to figure out how to wire one to the ecu. Which pins on ecu do I connect the o2 sensor to and how exactly do I connect the wires. There are wires already in the slots I believe is the ones I need to use. Do I just tap into it or cut it and add my wires to it. I have the wire harness and ecu for the y8 manual motor. No o2 plug in cabin. And reverse not working so how do I get that to work as well? Any help would be greatly appreciated. Mahalo