Abstract: An installation method for security switches located in door jambs and connection into security system wiring is provided together with a mounting fixture for simplifying the installation. To avoid wall damage, with cylindrically packaged security switches inserted snugly in a hole drilled part way through a door jamb a few inches from the floor, an installation fixture holding a drill at an angle is inserted into the switch mounting hole for drilling at a desired angle a system wire passageway hole into the switch mounting hole wall to extending downwardly through the floor. Another drill held in the fixture at a different angle permits routing of the mounting hole wall form a wire transit channel axially adjacent to an inserted switch for passing the system wires back to connect with the security switch.