Which dimmer wire to hook gauges to?

[Drift]

Hi, I'm wanting to dim the gauges when the dash dims. There are 6 wires on the back of the dimmer switch, which wire do I hook it up to or are there any other wires (please be specific) that I can hook them to to have them dim with the dash?

[VitaminT]

I connected all mine to the dimmer wire that runs to the radio. I think I actually used the "Illumination" wire, but it might not dim that way.