Help! O2 Sensor Wiring!!

Hey all . . new to the forum here. Looking for some help on a topic.

I have a 93 Integra RS. I have a problem with the O2 sensor wiring. I bought this car and there is a Ford O2 sensor wired into this thing. Yes, that's what I said, a Ford O2 sensor. Needless to say the car does not run properly. The wiring has been modified for use with the Ford sensor, and now I have to fix the problem.

What I need to find out from somebody is this: on the back of the motor above the oil filter the engine wire harness has a plug that goes to the O2 sensor. Can somebody look at their 92-93 motor (90-91 is different) and tell me if the O2 sensor plugs directly into the engine wire harness or if there is an extra section of wire harness between the main engine harness and the O2 sensor?

Also, is it true that the O2 sensor for 90-91 LS motors is in the front of the header and 92-93 O2 sensors are on the back of the header?

Thanks

Ethan
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