I'm trying to hook up my Apexi TT to the O2 sensor. I have some confusion on what wires the O2 + and - are. I've read a post stating that the O2 - wire on the ECU is the Red w/ Green stirpe and the O2 + is the White wire which are both on the 2nd plug from the right side of the ECU. The problem I have is there are 3 white wires on that plug. So I've looked and cannot find a WRX service manual in my dumpy little town. Can anyone help on providing which white wire to use?