The Roxor factory headlight mounts are solid. The will stay when you replace the headlights.
The headlights adjust up and down. Take a 5mm socked to make the up down adjustment at back of the assembly you show. Just point the vehicle at a wall from 5ft away and turn the screw. You will see the light beam move.
You can find a detailed description of how to replace the headlights in ine of my posts.