How do you install a CD player on a 94 Mazda Protege?

there should be a plastic base plate that goes around the factory receiver held in my clips. by pulling directly out toward the backseat that should easily slide out. then there will be 4 screws holding in the factory receiver, remove those as well as screws holding in the plastic dummy place also in there. you can purchase a bracket that will screw into the preexisting holes and mount your aftermarket receiver into that brackett

hope that helps