Rear O2 (lambda)sensor

Hi guys!

A little help or push in the right direction will be appreciated Please.
I’ve searched the forum now for almost 2 years,
And came across hundreds of threads, but no one with my specific answer,

My sons k12 have the commonly discussed rear O2 sensor error,
The engine is the CR14,
I’ve decatted the car already . As I was instructed by a mechanic friend,
in my country we don’t have the annual emissions/ safety inspection or MOT like the Brits calls it,
Now it brings me to the question,
To which os the wires do I connect the 2ohm resistor to in order to fool the ECU?
And a remapping is out of the question.
I am sure it’s been done plenty times on racing/ track cars

Many thanks
PandaQ
 
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