The servos have 7 wires, all of which areu used on a SkyView installation, and 5 of which are used on a D10/D100/D180 installation. If you're using the SV-NET-SERVO harness, all the wires are there, but only 4 of them go to SkyView Network connector. Then there's separate wires on that harness for poewr/ground (they need to be powered by ship's power, not SkyView) and also for the disconnect wire that needs to go to your disconnect switch. With other modules, all of the wires go to the SkyView network since the ADAHRS/EMS get their power from the display, and there isn't disconnect. The difference with the servos is that they need their own higher current power from the aircraft, as well as that disconnect.