[Oscar The Grouch]

You use the o2 sensor that is on the manifold. I believe it is the shortest one. I'll check in a bit as my car is currently on the jack.

Here's some photos I promised you.



PCV hose location just on the intake manifold (I have it as a clear tube).



Photo of the intake tube going from the MAF to the Turbo inlet. You can see how I routed some of the wires.



Another pic of the intake tube going from the maf to the Turbo inlet. Intake tube is on the lower left.



Here is your answer for which o2 sensor to use.



General pic of the back behind the turbo.



Pic of the location to put the air filter tube to mount. There is a plastic fastener there originally, just remove it, tie it off. Retap the spot or drill it bigger and fasten with a washer. Mine is off right now as my bushing broke and I'm applying new resin to fix it.



Here is the setup at the oil filter. Yours will look a little different as I have an oil filter expansionary base for my oil sensor.



Another pic near the filter to give you a better view.