2003 SAAB 9-3 repair Question Rear brake repair

It happen to me with friends car the cylinder on the calipers does not go back. She left the brakes so far out to consume. So my answer is use a C clam to push the cylinder back, but first open the hood of the car open the brake fluids cup. When you push the calipers back with a C clam the fluid will rise is no problem. When you done with both tires on a back push the paddle couple of times and the fluids will go in down like it was before.