best spot to weld the wideband bung

Entered using my iphone/ damn thing thinks it knows better than me.
Yes, wideband-o2. Any who, thank you for the information.

 

[dsmless]

i have a aem wideband kit and i just put the sensor in my stock o2 location it has a signal wire that can replace the stock ecu signal so no need for the factory o2 anymore it also has another wire to run for a stand alone i am currently running my.aem wideband on my stock 90 ecu on my turbo colt and it hasnot thrown a check engine light so i can say it works good had the same gauge on my galant in the factory location and no light also this was for like 3 years