This evening I installed the power outlet and music connection in the openings in the seat front bulkhead. I also made and installed the ground wire for the power outlet.
After installing these two components I checked the continuity of the auto pilot servo bundle. I check the continuity between the spade connectors at the tail cone to the spade connectors under the seats. Then I checked the circuitry from the spade connectors under the seats to the D-Sub connection on the instrument shelf. All is well. There is continuity in these wires and connections.