I have a 92 civic vx hatch and it has a OBD1 JDM B16A and i never did the 4 wire O2 convertion. now it is time to get emission and i need to convert. i have found directions online the only problem is that the directions say that the 4 wire O2 sensor should have 2 black 1 gray and 1 white and the sensor i have has 1 black 2 white and 1 gray can someone help me out on this

 

the two white wires are for the heater element..black and grey are for the O2 readings, black is positive and grey is negative.