O2 sensor prob

I have a problem with my O2. The wire is cut and don't know where it needs to be hooked to. There are no wires that I see coming from the computer. Please help!?!?

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about 2" from O2

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that's just it, there is no harness or I dont know what wire it is for the O2, or where it would be at.

This pic might help. It does not show the actual green plug, but it should be there. It is a single wire (non-heated) O2 sensor. It's right there where the multimeter red probe is.
The computer pinout should be in the Haynes manual electrical diagram.

I don't know if I mentioned it, but the O2 is the one nearest the cat., not the one on the exhaust manifold

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I don't have a scanner or any other means of uploading. As far as I can tell the O2 is in the factory location (not real sure), I have not had a chance to check for the plug, yet its been like 20 or colder and Im stuck working on my project outside. Yes, the electric choke is cut, I have an additional wiring harness for the carb that has the plug and all, just wasn't too sure where it went. You've been a great help though, thanx and I'll try and get on that Monday, and let you know from there.

Here is the stock O2 sensor location in the exhaust manifold.
The wire runs between the firewall and the engine to the passenger side under the intake manifold.
I'll see if I have some pics of the harness plug.