Adding-on what lleader said, yes they're only for the front. The back suspension don't use a spindle, so the bolts would be useless. To do the backs, your going to need a camber plate, and I don't know where you can get one for these cars.
To install them, you replace one of the two (I always pick the bottom bolt, but the instructions say the top one) bolts and replace it with the camber bolt.
The "handle" faces towards you while the "tab" faces towards the car. Before tightening the bolt in place, rotate it to the desired degree...then tighten down.
The diagram below is a TOP view of your suspension.
Though they will begin to "roll" and you'll be at 2* of camber within a month...no big deal.