"Make up a connector for the 78 pin main
connector P0001. Use wire size 22 AWG. Put wires on PWR1 pins 19 and 20 and tie
them together for the power supply +12 volt input, if you want to protect it
with a CB, use a 2 amp breaker (normal is 5 amp, but in the airplane it is
protecting the wire, not the 430W. Put wires on GND pins 77 and 78 and on Demo
Mode select pin 75, tie these three together and connect to ground on the
external power supply.