Location of electrical aux tap wire?

Good Morning Gentlemen! First off, I have a 2015 Outlander Max 650 XT.
I am wanting to mount an auxiliary horn to my ride. Somewhere I read where there is supposed to be an auxiliary 12V tap under the instrument panel. I can’t seem to locate it. Does anyone know its location or color code? My thought is to use it as the 12v source for the relay. Your help is appreciated!