I am trying to put together an 89 supercoupe that has been apart for 5 years or so. Everything has gone well so far but now I am stuck with one engine harness connection. I can't figure out where to connect the harness that connects the passenger side O2 sensor, oil level sensor, and knock sensor to the main harness or wherever it connects. It is a male rectangular grey plug. Not sure if I am missing part of the harness or just can't see where it goes. I'm sure its simple but I have looked at it for hours. If anybody can help me out that would be awesome.