Wiring harness for F225

[Buck]

I have a 2002 F225 with digital gauges. I need to find the 12Volt line that is switched by the ignition switch in order to hook up a fuel flow meter. What is the color coding for the ignition switch and wiring harness?

Thanks,
Buck

[boats.net]

The Yellow wire in the harness that goes to the gauges is 12 volts when key is on.