Oxygen Sensor for my 85 911 Carrera issue

[BrianW-n-SC]

Oxygen Sensor for my 85 Porsche 911 Carrera issue.
I had to replace my catalytic converter and the oxygen sensor. The old O2 had seized up in the old Cat.The old O2 had just one black wire to it. I ordered a new Bosch OME Oxygen Sensor and it came with 3 wires (one single black plug….ground I guess) and (one two prong plug white and black). I found where the single (ground wire?) went the ground headed to the DME ground. I would assume that the other two prong plug should go somewhere in the eng compartment. I have look hard for a plug with one green wire and one yellow wire (going by my electrical wiring diagram). I can't even find any wires not being used. Any ideas???

[burgermeister]

1) An acetylene torch used to heat up the bung cherry red would have gotten the O2 sensor out of your cat I bet

2) 85 is a DME car and should have a 3 wire O2 sensor and appropriate plug & harness AFAIK. 2 wires are for a heater, and the 3rd is the actual sensor. I don't remember which is which, but the heater has pretty low resistance so a multimeter should be able to verify.