488, I slide my jack infront of the rear wheel (making the jack perpendicular to the car) and put it under the frame, which is almost in the middle of the car. You should see 2 "bars" running from the back of the car towards the front.
Just start jacking away, the entire rearend lifts up. Then slap your jacks under the "bars" just behind your jacking point. The first time I did it, I noticed that it left small marks on the frame, so I put a little piece of carpeting on top of the stands when they hold up the car.
Take your time and be careful.