How do I tap into the light dimmer circuit?

[LtNoogie]

I'm installing Autometer gauges and have found that the LED backlight illumination is too bright at night. Does anyone know where to tap into the dimmer-controlled circuit?

My friends and I are guessing that the car uses pulse width modulation to dim all the illumination LEDs throughout the dash and AT shift console. Autometer sells a little box that will dim their meters but I'd rather control the light output from the factory dimmer switch.

Thanks