92civic_si

ok..i'm having a problem..i'm swaping a 99obd2 motor into my 92civic si hatch..on the tranny side there are 4 plugs coming from the motor and from my car there are 3 plugs..the 3 plugs pluged up w/ plugs froom the motor but there's one extra plug (from the motor)..i'm not sure where that plug plugs into.. there's 3 wires from that plug..can some1 plz help me..


thanks