I would run tubes in the wing. To me it makes life easy.

I cut the wires about 3 inches from the servo and solder on shielded wire when I need to make long runs.

If you keep the connectors I would take a section of wire or a small wire tie and tie the connectors together by inserting it between two of the wires on the connector or use a section oh heat shrink tubing or electrical tape over the connector.