Hey guys I searched and think I found my answer, but I want to make sure.

Which wire do I tap into to install my A/F gauge? The white one on the ECU, right? By the way I have a 92 GSR (OBD1).

...and yes I know the gauge is pointless

EDIT, also anyone know what I can/should use for nitrous gauge illumination? It needs a dash lighting or switchable 12v light source.

Thanks