Signal wire for o2 sensor

[Galantvr4559]

I am looking foe the car side signal wire to hook up narrow band air fuel gauge on my gvr4. If anyone knows I would appreciate it.

 

[Brunoboy]

see the weird looking harness that looks out of place near the ecu? theres a plastic cap type thing on it that looks like a plug but nothing goes there. well Tap into the Green/white one. or you can tap Pin 4 on the ecu.

 

[Galantvr4559]

Thank you