Mine too is mounted on the front bumper, where it also adds ding protection ! for the aluminum bumper.
Mounted it with two HD truck-bed tie-down rings. I think they were ~3/8" studs on the rings to fit through the holes in the jack riser.
Did have it locked to one of the bumper padeyes (or you can run a bicycle cable lock between the mounting rings), but now have it coated with black truck bed liner and it's practically invisible. The large mounting rings also come in handy for quick access to rigging tackle.
The baseplate and jack ratchet fit in the bumper winch locker, right where i can find them.