Where to tap to have backlight on light bar come on with headlights

[35tires]

I'm not great with wiring... well I'm awful... and I've got an s8 with an orange backlight I'd like to tap into the headlights so that when they auto come on, the orange backlight auto comes on as well. I'd rather not tie it to an aux switch.

Where are people tapping for that type of light, like a raptor grille light, etc?

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