How to Hide Hreflang Manager Lite Admin Menus

function plt_hide_hreflang_manager_lite_menus() {
	//Hide "Hreflang".
	remove_menu_page('daexthrmal_connections');
	//Hide "Hreflang → Connections".
	remove_submenu_page('daexthrmal_connections', 'daexthrmal_connections');
	//Hide "Hreflang → Help".
	remove_submenu_page('daexthrmal_connections', 'daexthrmal_help');
	//Hide "Hreflang → Pro Version".
	remove_submenu_page('daexthrmal_connections', 'daexthrmal_pro_version');
	//Hide "Hreflang → Options".
	remove_submenu_page('daexthrmal_connections', 'daexthrmal_options');
}

add_action('admin_menu', 'plt_hide_hreflang_manager_lite_menus', 11);

Where do I put this code?