the A/F gauge can be wired to the o2 sensor wires on the computer, which is located by the drivers right foot, on the other side of that panel(kinda behind the radio), this is for a 92 VR-4 tho.
the boost gauge wires are for illumenating the gauge at night, so you want the gauge to light up every time you turn on your lights, right? so just wire it to anything that lights up when you turn your lights on. i wired mine to the dimmer, just pull the switch out and wire it up.
there is much more detailed info on this topis, just do a search if you need to
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