Spent another hour reorganizing the avionics bay wiring. Started out by completely unplugging everything from the power panel to free up wires so I can untangle/re-route them. I then focused on the firewall penetration area by separating the thermocouple lines running from the Engine Monitoring System (4xCHT, 4xEGT) from all the other sensor wires and power wires that pass though the same hole. The thermocouples are complete and the other wires are about 90% detangled.
Next to the firewall penetration. Thermocouples, sensors, power, and ground wires all pass through.