I'm guessing for the same reason all cars have the steering wheel and turn signal switch in roughly the same place.
Their URL design is heavily based on GitHubs.
e.g. https://cdn0.tnwcdn.com/wp-content/blogs.dir/1/files/2014/06... / https://cdn0.tnwcdn.com/wp-content/blogs.dir/1/files/2014/06...
I'm guessing for the same reason all cars have the steering wheel and turn signal switch in roughly the same place.