I have had mine apart soooo many times....but I can't recall.
My GUESS would be one to each side of the instrument cluster, one to the sunroof switch, one to the rear windows defrost switch and two to the antenna switch????
The reason I think the antenna switch takes two optic cables is its the only switch there with two illuminated choices...antenna up or down. The sunroof switch and defrost switches only illuminate on one side.
Does this make sense??? Nonsense????