I'll see if I can find anything on the filters...
Correct on the number and placement. They are rounded ended studs, about half of the length is hex shaped shaft. Base wasn't flared no, diameter at base was no bigger than the hex shaft.
Don't know what year you are attempting to model, but just as additional info, the NVG filter kits covered UFC readouts, advisory lights, master caution, and the caution lights panel. Aside from the UFC posts, the filters were all placed on with velcro (pretty shotty way of doing it). Around 2010(ish), they pushed out new lens covers and all the lighting was filtered to green to make it NVG friendly. The updated UFCs came a little later.