There's a few ways to do it. One would be to release tension on axle. The other (which I've used more than a few times) is to take a very big, burly screwdriver and shove it in the hole from one side. I use it to slightly pry the holes back into alignment, just enough so that I can slip a bolt in there.
I'm sure some will criticize my method, but it's worked for me a number of times, and I'd do it again if necessary.
Like I said though, you can release the tension on that control arm and get the holes to line up. Sometimes I start with a jack on that side of the frame and jack it up until the wheel on that side is off the ground. If you play around with jack heights and positions, eventually it will fall into place.
I'm sure someone has a better method, this is just what's worked for me in the past.