The gauge goes to your computer, not the O2 sensor. It's bling anyways and not accurate. You'll need a wideband (ie. AEM EUGO) Many people do it without problem, but when you hook it directly to the O2 sensor you risk fouling the sensor. In my 91 CRX there was only one wire, so it was easy. In my old EP civic it went to the green wire on a 4 pin sensor. Hopefully that gives you some help.
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