Look in the carpet at the back of the car for a little 'flap' in the carpet about an inch across, and if you lift it there's a hole about 1/2 cm across under it. The anchor points are just threaded holes that you can attach the rest of the car seat bolt and hook anchor system to - if you're looking for these, you won't find them.

You can buy the bolt and stuff for about $10 off ebay.