M50 engine o2 sensor wire

[M50B25]

I was putting a new engine in my 325is had taken off my exhaust from the headers to the muffler to get to the transmission. The transmission was removed, the new engine and wiring harness etc... was installed, the transmission put back in and now i'm putting the exahust system back on. I forgot where i unplugged the o2 sensor from and can find no wire or place to plug the wire from the o2 sensor into.

Can anyone help me out?

Thanks

[whosyadadie01]

which o2 sensors are we talking about here?

[M50B25]

the one that comes right before the catalytic converter.

[techvet]

Try looking for a bracket at the rear left or right side that holds the male or female connector that the 02 sensor cable connects to. The connectors are twists on types.
The length of the 02 sensor cable would give you the aproximate position of the bracket.

[whosyadadie01]

there should be a bracket that holds then to the body