Can someone explain how to replace the pads?

 

The best advice I can give you is this.Do not apply the E-brake!Jack up the rear of your car and put it on jackstands.Then take off both rear wheels so you have access to the brakes.Now,only do 1 side of the brakes at a time!!! That way,you'll be able to see how they go back together.Now,take off both drums by prying on them with a screwdriver.You may have to have a hammer help persuade them to come off also Now just choose which side you want to do first and take the pads off.I can't remember exactly how they go together,sorry.So you'll just have to pull one off and use the other side to see how to put it back together.Then after that one's working again,do the other side.Good luck.
Kevin