Unless you feel some need to change the studs you wouldn't change the thread and pitch for the nuts anyway but some wheels also have very small holes for the lugs and looking at yours they might be the same as mine. I got a free gorilla wheel install kit when I bought my wheels from Discount Tire - every lug is a lock and they've got a thin profile and socket.
You probably just have to wait until they come in to find out but that M12x1.50 is the important number to remember
Nice looking wheels by the way.