changing front brake pads on 1993 Ford Crown Victoria

changing brake pads, how do I compress the caliper piston to insert the newer, thicker pads for re-install on rotor(trying to avoid opening bleeder, and keep lines from being bled)

Asked by for the 1993 Ford Crown Victoria
Open the top of the master and use a 6in c-clamp to compress the piston. Check fluid after and top it.