well, the location of the O? should be relevant to the original location. if the O? was in the manifold then it needs the higher temp to run properly, if placed in the down stream location it will misinterpret the readings and will not run right. if the original was in the connector pipe then yes put it back in the connector. the part# for each location is differant for each O?. I learned all about this from my missed shipped LCE header with two O? bungs. and yes some kalifornication even have two O? sensors.
also get a ND or NGK sensor, that bosch will give you nothing butt<img src="/forums/images/graemlins/butwiggle.gif" alt="" /> problems............Karl