Where to get power for gauges?

[Chipdog]

I hooked up two gauges to a Gauge Cage in the A/C vent. Everything is set up but the power for the gauge lights. Where do I tap into to get them to light up when the lights are on only?

Thanks for the help

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92 GT Convertible
Hooker Headers, H-Pipe, Flow Masters, 4.10s, BBK 1.5 drop, 73mm Mass air, 65 FMS TB, FMS Aluminum radiator, T-5 swap with a Steeda shifter.

And a Small Blow Job