Without seeing your dash setup, I can't offer specifcs. But you'll need to access the back side of the gauge to remove the bracket. If your gauge panel is screwed in, that's the way to get to it. Otherwise, access it another way - such as through another removable panel or possibly from behind (actually "in front") via the dash cubby/storage compartment.
Either way - it's extremely simple and easy to figure out once you start.
