10 & 2 always. That's the way Matt and Scottie Thompson said to wear them, so that's the way I've always worn them. I also notice that most others do as well, but I really don't pay attention these days.

Do whatever makes you happy. The worst that will happen will be a warning from the Kilt Police! I don't think they even hand out citations for failure to flash properly. (Tongue firmly planted in cheek.)