You want to put axle stands on the side sills nearest the rear of the car, where the metal looks reinforced, making sure the car is high enough to have the wheels off the ground. Then use a jack to lift the spring cup a little, and undo the damper bolt. You (or a mate) may have to pull down on the spring cup (or pull down on the wheel) to be able to pull the spring out. Then do the same for the other side..