Three years ago you bought the wheels and are comparing to a website photo of today's product. I don't know, but Fulcrum 5 might be much like Shimano Dura-Ace, Ultegra, 105, etc. The name is just a tier level of their products. Shimano 105 of today is not Shimano 105 of three years ago.
I'm assuming that you bought the wheel from Fulcrum or one of it's authorized dealers. So a check with them should find you the answer quick. As well, they may have maintenance manuals available for the hubs, unless they consider that something for dealers and service centers and won't give you access to them.