"Master Cylinder Reservoir:
Place plenty of paper under the master cylinder.
Separate reservoir from master cylinder by gently pressing sideways and pulling out. Clean reservoir with denatured alcohol or brake fluid. Inspect seals and replace. Fill reservoir with fresh fluid. Connect power bleeding unit to reservoir (E-ezibleed or Power Bleeder, above.) Jack up car and remove wheels."

Ok, sounds simple enough but how do you prevent brake fluid from spilling out the bottom of the master cylinder? Aren't there 2 holes there that the fluid will drain out? Do I suction the brake fluid out some how?

Thanks