It took me 45 minutes to get those wires through. Tip. cut a long oval about 1/4" by 1" for the connectors to pass thru, any less and the extension will never make it through the fuse opening, Also pull 1 thru at a time. Put string in the tube early and use some string to wrap thru the wires on the connectors where they butt together and knot them tight. Make the tunnel entry at the back of the wing as wide as possible. Thats where all my problems were