o2 Sensor Help
 

So I installed a new exhaust on my 1980 SC.....however when I went to switch the O2 sensor from the old cat to the cat bypass I noticed the O2 sensor was never plugged into the car......it had just been lying there connected to the cat and nothing else. I have been searching the forums looking for where the o2 sensor gets plugged in to and how but I haven't been able to find it......can someone help??!!

its a strange looking conn. in the engine bay, left side close to you cdi box, mounted on a metal bracket, if its still there, it has a yellowish tint to it.

thanks!