Tips on Customizing Keywords to Links Converter

How to Hide Keywords to Links Converter Admin Menus

function plt_hide_links_auto_replacer_menus() {
	//Hide "Auto Links".
	remove_menu_page('edit.php?post_type=lar_link');
	//Hide "Auto Links → All Auto Links".
	remove_submenu_page('edit.php?post_type=lar_link', 'edit.php?post_type=lar_link');
	//Hide "Auto Links → Add New Auto Link".
	remove_submenu_page('edit.php?post_type=lar_link', 'post-new.php?post_type=lar_link');
	//Hide "Auto Links → Settings".
	remove_submenu_page('edit.php?post_type=lar_link', 'lar_settings');
	//Hide "Auto Links → About".
	remove_submenu_page('edit.php?post_type=lar_link', 'lar_about_settings');
	//Hide "Auto Links → Upgrade to PRO".
	remove_submenu_page('edit.php?post_type=lar_link', 'https://wpruby.com/plugin/affiliate-butler-pro/');
}

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

Where do I put this code?

How to Hide Keywords to Links Converter Meta Boxes

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

	//Hide the "Disable Links Auto Replacer Lite for this post" meta box.
	remove_meta_box('lar_meta', $screen->id, 'advanced');
	//Hide the "Upgrade to PRO" meta box.
	remove_meta_box('lar_pro_metabox', $screen->id, 'side');
	//Hide the "Add new Link" meta box.
	remove_meta_box('_lar_links_metabox', $screen->id, 'normal');
}

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