OX sensor on my Lude. 1990 Si DOHC

When I put my exhaust manifold on I let the pipe under the engine drop down and forgot about the OX sensor. Well, I pulled the wires out of the socket from it and now I don't know how they go back. I guess but must have guessed wrong because my Check engine light comes on after only a few minutes of driving. I know that the 2 grey wires are grounds and go on the bottom but don't know where to put the other 2 wires. I think one is green and ...hmm maybe brown? I'll check tonight for sure but thought someone might know.
Rob

I can help you let me know which O2 sensor you are having a problem with I have a 90 2.0 si, it has 2 o2 sensors
email me and I will help you