Where is the wire to the O2 sensor going? Or where are the O2 sensors? I'm not sure where to wire it up near your computer but what I did with my shiftlight was I ran it underneath the car under teh shifter boot. You can just tap into one of the O2 sensors in your exhaust right there and wire tie everything. Also you might want to tap it into both o2 sensors and build a switch where you can check the left or right bank. Thats what I did on my old car at least.
Yeah smarty but the part about wasting ur money was the fact that wiring to a gauge to ur stock narrow band 02 sensors is just a lame light show. They only target a 14.64 A/F ratio for closed loop driving, which is at part throttle and idle, and all they do is bounce back and forth teling the computer to add a little more and a little less fuel. The most important part WOT ur computer doesnt even use the 02 sensors, they are shut off because it uses set scalars and table from the computer to get its info. So in short HUGE waste of money, but at least u will look reallly cool with ur bounching gauge.
As far as wiring it, you can grab the signals right over by the puter in the passenger side kick panel. Autometer used to have the wire numbers on their website but I can't find them. Probably could call and ask them, they are helpful.