Need power to the strobe power pack, so I ran three wires to the front of aircraft. One for power, ground and one for port activation. This particular power pack has six ports. In order for just a few ports (3 - 6) to be active I need 12v to the blue wire in image 2. The yellow wire sets the flash pattern and the others are not used. To finish the job I need some more connectors. I could just splice the wires but I am concerned about the EMI that will generate. I will order the pins tonight.
So there is a growing bundle of wiring at firewall.