Guess, but I think I know what he means. It's the knurled screw that holds the sidecover in. But it normally is a 6mm phillips black buttonhead, the same as in the fairing.
If it is that...they are made from extra large terminals available through JCar . The shaft is cut a little shorter, and the head is araldited into the shaft.
You can get a choice of colours too ..black or red.image

Ron
Mildura
GTR-AUS #20

To quote Leonie Bressanelli "It's all about the bike"