ORIGINAL: vicman
You just showed the simple easy way for sure.
For a first timer I would go this way too. Also you should consider using shrink tube or other method to keep the servo wires connected to the Y harness or extension wires. You can buy some connector boxes that keep them togeather but they seem to be a little bulky to snake thru the rib holes after the wing is covered. I usually use shrink tube.
I don't like the heat required to shring the tubing. Sometimes the wire covering will also shrink and pull out of the crimped ends.
I use a very small cable tie and put it between two wires and tie the two housings together. Make sure the ratchet end is not in the center, but on one end so it doesn't get caught pulling through the ribs. Another think I've done also is to wax up a length of Carpet thread and tie the cable ends together, using the same wrap lengthwise to the plugs.
Other than when you pull the servo wires through, you dont need the retainer. I fly with a short set of aileron leads from the receiver, and then the extended leads from the servos, if need and just plug them together each day when I assemble for flying that day. I've never had a lead pop loose.
Don