Tips on Customizing WP Directory Kit

How to Hide WP Directory Kit Admin Menus

function plt_hide_wpdirectorykit_menus() {
	//Hide "Plugins → Install Plugins".
	remove_submenu_page('plugins.php', 'tgmpa-install-plugins');

	//Hide "Directory Kit".
	remove_menu_page('wdk');
	//Hide "Directory Kit → Listings".
	remove_submenu_page('wdk', 'wdk');
	//Hide "Directory Kit → Add Listing".
	remove_submenu_page('wdk', 'wdk_listing');
	//Hide "Directory Kit → Fields".
	remove_submenu_page('wdk', 'wdk_fields');
	//Hide "Directory Kit → Categories".
	remove_submenu_page('wdk', 'wdk_category');
	//Hide "Directory Kit → Locations".
	remove_submenu_page('wdk', 'wdk_location');
	//Hide "Directory Kit → Search Form".
	remove_submenu_page('wdk', 'wdk_searchform');
	//Hide "Directory Kit → Result Card".
	remove_submenu_page('wdk', 'wdk_resultitem');
	//Hide "Directory Kit → Change Currency".
	remove_submenu_page('wdk', 'wdk_change_currency');
	//Hide "Directory Kit → Messages".
	remove_submenu_page('wdk', 'wdk_messages');
	//Hide "Directory Kit → Settings".
	remove_submenu_page('wdk', 'wdk_settings');
	//Hide "Directory Kit → Documentation".
	remove_submenu_page('wdk', 'https://wpdirectorykit.com/documentation');
	//Hide "Directory Kit → Currencies Addon".
	remove_submenu_page('wdk', 'wdk_addons_currencies');
	//Hide "Directory Kit → Membership Addon".
	remove_submenu_page('wdk', 'wdk_addons_membership');
	//Hide "Directory Kit → Booking Addon".
	remove_submenu_page('wdk', 'wdk_addons_bookings');
	//Hide "Directory Kit → More Addons".
	remove_submenu_page('wdk', 'wdk_addons');
	//Hide "Directory Kit → Support Forum".
	remove_submenu_page('wdk', 'https://wordpress.org/support/plugin/wpdirectorykit');
	//Hide "Directory Kit → Contact".
	remove_submenu_page('wdk', 'https://wpdirectorykit.com/contact.html');
}

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

Where do I put this code?

How to Hide WP Directory Kit Dashboard Widgets

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

	//Remove the "Wdk News" widget.
	remove_meta_box('wdk_dashboard_widget_news', 'dashboard', 'normal');
	//Remove the "Wdk Latest Listings" widget.
	remove_meta_box('wdk_dashboard_widget_latest_listings', 'dashboard', 'normal');
	//Remove the "Wdk Listings map" widget.
	remove_meta_box('wdk_dashboard_widget_map_listings', 'dashboard', 'normal');
	//Remove the "Wdk Usage Stats" widget.
	remove_meta_box('wdk_dashboard_widget_stats_usage', 'dashboard', 'normal');
	//Remove the "Wdk Listings Stats" widget.
	remove_meta_box('wdk_dashboard_widget_stats_listings', 'dashboard', 'normal');
}

add_action('wp_dashboard_setup', 'plt_hide_wpdirectorykit_dashboard_widgets', 20);