Use the supplied hardware and screw the lip to the bumper. This lip requires you to screw directly into the plastic bumper, it does not use the OEM locations.

OEM Tabs would not offer enough support for the front lip so screwing it directly to the bumper is the best and strongest option.

The screw holes will not be visible if the lip is removed.

There are pre-drilled holes in the lip. Use those holes as the mounting locations.