Its relativy easy, but advise you use a magnetic socke to remove the bolt if you have one, as if you drop it, it can be a pig to retrieve.
You wilk guess from this, you need to remove the plastic cover on top of the radiator. From there, you will see 3 bolts holding the light assemby in place. 2 on the top, 1 tricky one lower down.
Not a tricky job really.