I do all mine the same.

Make the cabane hole in the wing fairing slightly larger than the piano wire (large enough to feed the sero lead {without connector} through).
Hollow out the cabane and run the wire inside, next to the piano wire. At the wing, either beside the mount or better if you can, in the middle of the mount, make a slit just large enough to take the connectors. Pull the connecotr through, connect and tuck back up inside. WHen you want to remove the wing, simply tug on the wire until the connector pops through and disconnect.

Check it out on my latest, a Fokker Dr1. Betcha can't see the wire or connectors.

Hope this helps.