Tips on Customizing Open User Map

How to Hide Open User Map Admin Menus

function plt_hide_open_user_map_menus() {
	//Hide "Open User Map".
	remove_menu_page('edit.php?post_type=oum-location');
	//Hide "Open User Map → All Locations".
	remove_submenu_page('edit.php?post_type=oum-location', 'edit.php?post_type=oum-location');
	//Hide "Open User Map → Add new Location".
	remove_submenu_page('edit.php?post_type=oum-location', 'post-new.php?post_type=oum-location');
	//Hide "Open User Map → Settings".
	remove_submenu_page('edit.php?post_type=oum-location', 'open-user-map-settings');
	//Hide "Open User Map → Upgrade".
	remove_submenu_page('edit.php?post_type=oum-location', 'open-user-map-pricing');
}

add_action('admin_menu', 'plt_hide_open_user_map_menus', 1000000000);

Where do I put this code?

How to Hide the "Open User Map Location Settings" Meta Box

function plt_hide_open_user_map_metaboxes() {
	$screen = get_current_screen();
	if ( !$screen ) {
		return;
	}

	//Hide the "Open User Map Location Settings" meta box.
	remove_meta_box('location_customfields', $screen->id, 'normal');
}

add_action('add_meta_boxes', 'plt_hide_open_user_map_metaboxes', 20);