Brakes

Hard to explain with words but the way I do it its blocking the front wheels good then raise your car and put the towers on both back wheels and remove just one side (the brake pads and all the springs) and keep the another side as reference that way you can compare what you are doing, doing brakes is not as easy as it looks you have to be trained and work with confidence, one single mistake can cause an accident!
If you are not familiar with the mechanical work take it to a service shop.

Manuel.