Hehe, when I did mine I found that I could light the bulbs by only connecting 1 wire
It would ground simply from static it seems. I have the straight configuration, and haven't used the squares. I'd imagine they are the same except for the shape of the connector. Anyway, the pins are set up in pairs. Each pin is directly connected to the 2nd one. If you test with a multimeter, you'll find there is no resistance between the connected pins. All it takes is hooking the yellow wire to either pin of 1 pair, and the red to either pin of the 2nd pair.