02 Sensor harness not found?

[xFidelity240sx]

So I bought my 240sx almost a year ago and when I got it, it didn't have an 02 sensor (before the cat) - The car is an 89 hatch (pignose ftw! ) with a 92 KADE that was rebuilt w/ 22k (estimate) on the motor.

The dude that I bought the car from doesn't know jack s*** about anything he was doing, and ended up driving around on all of the 3 and 30 day emissions exemption passes (I live in AZ) so I can't go and get it diagnosed.

So I'm coming here. I cannot find the harness for the sensor to plug into, and because I don't have it, it runs like complete s***. The harnesses are s***, clearly botched and they've shown where their corners were cut (such as the upper harness rubbing on my belts). I have $1000 atm and I need to fix this thing ASAP so I can DD it to school and eventually work. I do have the sensor in I am just lost onto where I can plug it into.

Also, my intake was botched to s*** and my timing is SUPER off. The distributor bolts aren't on the distributor and I accidentally moved it a little, and I was told that can change the timing. I have pictures of everything.

I just put new NGK G-Power plats in it and it's finally running. Just horribly.

[xFidelity240sx]

Nobody replied so I took matters into my own hand! I figured out the second 02 sensor is useless, but the first one is the important one.

I fixed my idle issue via cleaning my MAF and now it idles super perfect. After inspecting my headers (Hotshot headers btw) I realized that the plug that's in the header right now is probably not an 02 sensor, or at least it isn't hooked up to the ECU. There's a blockoff on what looks to be the correct placement of the 02 sensor, and after looking at it, I realized again -- That my main issue was the harness it connects to. So how do I go about connecting my 02 sensor to the ECU? I'm leaning out and my car has no power. Which I assume is because I'm not getting enough fuel or I don't know!