HELP:A/F ratio meter in 92 civic

i got an autometer air/fuel ratio meter and i wana put it in..

no i dont have an aftermarket O2 sensor... can i just hook it off the computer??
oh ive got the JDM computer(from b16a) so which wire do i connect it to??...

can i run it off the sensor? theres 2 wires a white one and cant rem the other colour...

i got told by my auto electrician that if i dont use an aftermarket sensor then, the gauge can mess the the ecu frequencies...

anyone??

sure, i can help u....PM me