Sorry to hijack this thread but....

I have a canon 1100d and have ordered on ebay this Yongnuo yn-560 II fash. I am noob and am not sure how to fire the flash off camera apart from firing the onboard flash to optically trigger the yn-560. Can I run a cable from my camera to the flash? I am hoping I can run a cable from the remote plug under the side door to the flash but that's only guessing. I think the remote plug is 2.5mm because a standard 3.5 audio plug doesn't fit. I believe this flash uses a pc port plug. So will a 2.5mm to pc port cord get me out of trouble or do I need something to connect to the hot shoe?

Should I be thinkin' wireless trigger?