Dimmer tap for boost gauge

[17GT]

I'm not sure anyone has discussed an easy access to dimmer control for aftermarket gauges. I will be installing a Spek Pro boost gauge which has a single wire for dimming control. I know where to tap for power in the fuse panel but am unsure how to control the dimmer function. Any suggestions would be appreciated.

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[Stang-15]

Would like to know this as well.