Another amateur radio operator - welcome Peter!
I don't think there were fittings for sun visors in 1994, certainly my 1993 4/4 did not have said threaded posts, nor holes drilled and tapped for them. My '97 +4 may have done, I can't remember now.
It's either a peaked cap, probably of the baseball variety, or if you can find any those that clip over the top of the windscreen?
