JT 3" exhaust and lamba sensor

[TraSh]

Hi!

I've mounted lately a full JT 3" exhaust on my Saab 900NG. I am little bit confused though as to where should I fit my lambda sensor. There are 3 places where it can be fitted. 1st is just after the turbo, 2nd is just before the cat and 3rd is just after the cat.
In original exhaust the lambda is fitted just before the 1st cat, but after that small thing (don't know English word for it) that looks like a basket. In JT lambda may be fitted before cat and also before that basket thing. There's no spot to fit it between them.
Does it really matter where I fit the lambda? Currently I have it just after the turbo.

[Plupp]

In the same place as the lambda was placed in the orginal downpipe.

My tip. Just after the turbo