Dynamic Menus

I’m developing locally, and I have added this code to my functions file:

add_action( 'init', 'register_my_menus' );
function register_my_menus() {
	register_nav_menus(
		array(
			'primary-menu' => __( 'menu-top' ),
			'secondary-menu' => __( 'Secondary Menu' ),
			'footer-menu' => __( 'Footer Menu' )
		)
	);
}

I have added this code to my header file:

<?php wp_nav_menu( array( 'theme_location' => 'menu-top', 'container_class' => 'my menu' ) ); ?>

Am I filling in the correct information and in the correct locations? menu-top is the menu I have created in appearance > menus, and mymenu is the style sheet that I am trying to link to.