I think it's the same principle as pre facelift. Cover on the back with 4 clips to pop off and cover will reveal bulb holders(somestimes there is a mini torx screw also holding this cover), yes headlight will need to come out.
Remove headlight using torx screw and pushing down the clips.
Move headlight so you can get to the back.
Remove the rubber cover.
Depending on it you have xenons or normal bulbs depends on the next bit.