How to Hide SiteLock Security – WP Hardening, Login Security & Malware Scans Admin Menus

function plt_hide_sitelock_menus() {
	//Hide "SiteLock".
	remove_menu_page('sitelock-plugin');
	//Hide "SiteLock → Dashboard".
	remove_submenu_page('sitelock-plugin', 'sitelock');
	//Hide "SiteLock → Settings".
	remove_submenu_page('sitelock-plugin', 'sitelock-settings');
	//Hide "SiteLock → Activity Logs".
	remove_submenu_page('sitelock-plugin', 'sitelock-activity-logs');
	//Hide "SiteLock → Give Feedback".
	remove_submenu_page('sitelock-plugin', 'https://wordpress.org/support/plugin/sitelock/reviews/#new-post');
}

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

Where do I put this code?