B!^A@

okay i am currently driving a 95 hatch with a B16a2 the motor i belive that it is a obd2 motor and currently i am using a 1 wire o2 sensor when it needs a 4 wire o2 sensor but i used my stock harness for this swap and the harness is obd1 the plug for the o2 sensor is for a 1 wire and the 4 wire o2 sensor wont plug right in what do i have to do? any one put steps,pics etc..... Thanks
Oh and i am using a p30 ECU