ill try to find out for you as I have this same setup. I personally bought mine just to fill a hole until I got my wideband as ppl are right the A/f meter is junk but Ill try to remember the wire.
They are not 100% junk but no where near what a wideband.
If you go rich or lean for a long time it may help but bottom line is when the O2s switch rich/lean in closed loop there is no way that A/F gauge will keep up with them.
So unless you have a major problem then they aren't worth the $$ and trouble for a light show.