oxygen senors

Hey Y’all, Never had an F.i Mustang. Just picked up an 86 GT vert. 88k miles. stock everything Took it home, installed headers back exhaust w/ cats 70mm tb(I know too big probably) Removed smog pump and sealed vacuum lines and holes in heads after the work was done, she was idling rough...

Hey everyone, going to be replacing my o2 sensor harness in the next couple days with an extended one so I can have oxygen sensors, I was looking under the hood/under the car and was wondering Where is the main connector so I can swap them out? I can’t seem to find it... Thanks!