You must start by using a small standard screwdriver and popping the lenses out. This will give you access to the mounting screws that hold the housing in place.
Here is a diagram to get you going on the fix. Check out the images (Below). Please let us know how it goes
Repair Safety Notice: This information is for general instructional purposes only. Vehicle repair can be dangerous. Verify all information, follow manufacturer service procedures, use proper tools and safety equipment, and consult a qualified repair shop when needed.