I'm guessing that the wide white plug under the column was where your alarm was located. Am I right?? Way too easy to find. It kind of looks like someone knew your car, or they were just lucky. They were also kind enough to unplug everything instead of tearing it out. Next time around, I would mount the alarm way up in the dash somewhere. Put a siren under the hood, in a hard to reach area, and one under the dash, or in the back seat area. Also, if you have an old unused alarm, stuff that under the dash, and make it look real. Then if they think they've found it, they will give up as soon as they pull it and the siren doesn't stop. Then buy a big F-in' gun and have it out with the MF-in' SOB.........Oops, sorry. It brought back memories of when someone tried to steal my car.
Like others have said. Major Bummer! But like I was, you were lucky they didn't get the whole thing.
Brian