How to Hide SiteGuard WP Plugin Admin Menus

function plt_hide_siteguard_menus() {
	//Hide "SiteGuard".
	remove_menu_page('siteguard');
	//Hide "SiteGuard → Dashboard".
	remove_submenu_page('siteguard', 'siteguard');
	//Hide "SiteGuard → Admin Page IP Filter".
	remove_submenu_page('siteguard', 'siteguard_admin_filter');
	//Hide "SiteGuard → Rename Login".
	remove_submenu_page('siteguard', 'siteguard_rename_login');
	//Hide "SiteGuard → CAPTCHA".
	remove_submenu_page('siteguard', 'siteguard_captcha');
	//Hide "SiteGuard → Same Login Error Message".
	remove_submenu_page('siteguard', 'siteguard_same_error');
	//Hide "SiteGuard → Login Lock".
	remove_submenu_page('siteguard', 'siteguard_login_lock');
	//Hide "SiteGuard → Login Alert".
	remove_submenu_page('siteguard', 'siteguard_login_alert');
	//Hide "SiteGuard → Fail once".
	remove_submenu_page('siteguard', 'siteguard_fail_once');
	//Hide "SiteGuard → Protect XMLRPC".
	remove_submenu_page('siteguard', 'siteguard_protect_xmlrpc');
	//Hide "SiteGuard → Block Author Query".
	remove_submenu_page('siteguard', 'siteguard_author_query');
	//Hide "SiteGuard → Updates Notify".
	remove_submenu_page('siteguard', 'siteguard_updates_notify');
	//Hide "SiteGuard → WAF Tuning Support".
	remove_submenu_page('siteguard', 'siteguard_waf_tuning_support');
	//Hide "SiteGuard → Login history".
	remove_submenu_page('siteguard', 'siteguard_login_history');
}

add_action('admin_menu', 'plt_hide_siteguard_menus', 11);
Where do I put this code?