What do these letters mean on this headlight switch

Figured out what the problem is guys. The screw that holds the headlight switch that they supplied with the kit to the gauge cluster is to thick and wasn’t allowing me to push it in all the way so it was always in the daytime running position. So I have to modify the screw or find one that will fit it to allow me to push it all the way in. Thank you guys for all your feedback and help.