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This will help to insure proper cutting and a good fit. Now, mark the locations for the speakers mounting screws, remove the panel and drill the screw holes. When finished you may replace the panel. . After cutting and drilling all holes, inspect the mounting areas for any metal burrs or rough edges. File any area that may interfere with the mounting of the speaker. . Clean any metal shavings from the mounting area and check for areas in which water may enter the speaker cavity. Treat the area