i am changing out my 2 o2 sensors tomrw (before the cat..on the ypipe) and i was just wondering exactly where the 2nd o2 sensor harness is that is in the engine bay?

pics would be great

i know the first one right in the front of the valve cover but just not exactly sure where the 2nd harness is...

tips for the install?

 

From the FSM:

 

I had a really hard time getting the wire mount plastic clips out due to the less-than-friendly arrangement of "stuff" btw the engine and firewall. YMMV, but I ended up having to cut the O2 wires to get the sensor and wires out of the engine bay. Wasn't able to re-route the wire the same way either - real PITA, IMO.

Good luck!