For what its worth I never bury connectors anywhere in the airplane, thus no need to worry about securing them or corrosion from disuse.

What I do is cut the new servos lead in half and solder in new lead wire cut to the exact length needed. This avoids losses due to excessive numbers of plugs and wire. The only extensions are short ones from the Rx that the wing servos plug into. They are fully accessable and are repluged every outing so corrosion is not a problem.

John