That's not a traditional controller, it has a little drill on the underside. You attach it to your forehead and it connects to your brain, giving you a neural link to the Rev. Just make sure your character doesn't suffer any ammo explosions and you're all set.
BigJim: Have you gone through the PC controller aisles in a store lately? Try turning some of these gamepads upside down, some have middlefinger buttons.