so i got the AEM wideband o2 sensor with a/f ratio gauge and i hooked up the two red wires to the positive post on the battery and grounded the two black ones, put a switch in between the pink wire and hooked that up to the positive post as well.. just dont know what to do with the datalogger positive and negative wires.. anyone know?? the car is an 04 WRX and its still throwing a CEL.. need this fixed and the check engine light off before tuesday, February 14th!!

Thanks alot!