My QQ yak uses the wire clips. The clips slip through aluminum pins on the ends of the wing but there are washers with grommets glued to them that go over the pins between the fuselage side and the clip. Makes for a snug fit and no play. Really simple system. You can see it in the online manual here:
http://shop.lindinger.at/pdf/60516.pdf
You can kinda see it here:
http://shop.lindinger.at/pdf/60516.pdf
You can kinda see it here: