So my 2006 ZX3 does not have a tachometer in stock and I bought an aftermarket tachometer and have it wired up but I do not know where to put the tach signal wire to. I have researched and my car does have COP system and I have read I need a tach adapter. Is this true? Does anyone know where to wire the tach signal wire to? If so show pictures please, I am a visual person.