You're missing the forth screw found between the side of the headlamp and the outside of the metal body. Hard to explain it but if you search it I've seen some threads on here showing you were to look for it.
Gotta go up the inside of the front fender for the lower bolt. Get a small wrench (ratchet wrench will save you lots of cussing). Think it's the same size as the other ones. Maybe a 12mm?