Tips on Customizing Lenix Leads Collector

How to Hide Lenix Leads Collector Admin Menus

function plt_hide_lenix_elementor_leads_addon_menus() {
	//Hide "Leads Collector".
	remove_menu_page('edit.php?post_type=elementor_lead');
	//Hide "Leads Collector → All leads".
	remove_submenu_page('edit.php?post_type=elementor_lead', 'edit.php?post_type=elementor_lead');
	//Hide "Leads Collector → By form".
	remove_submenu_page('edit.php?post_type=elementor_lead', 'elementor-leads-by-form');
	//Hide "Leads Collector → Statuses".
	remove_submenu_page('edit.php?post_type=elementor_lead', 'edit-tags.php?taxonomy=lead_status&post_type=elementor_lead');
	//Hide "Leads Collector → Custom Fields".
	remove_submenu_page('edit.php?post_type=elementor_lead', 'edit.php?post_type=elementor_lead&page=elementor-leads-settings&tab=fields');
	//Hide "Leads Collector → Settings".
	remove_submenu_page('edit.php?post_type=elementor_lead', 'elementor-leads-settings');
}

add_action('admin_menu', 'plt_hide_lenix_elementor_leads_addon_menus', 206);

Where do I put this code?

How to Hide Lenix Leads Collector Meta Boxes

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

	//Hide the "Form Fields" meta box.
	remove_meta_box('FormFields', $screen->id, 'normal');
	//Hide the "Response to Lead" meta box.
	remove_meta_box('lenix_lead_response', $screen->id, 'normal');
	//Hide the "Custom Fields" meta box.
	remove_meta_box('lenix_lead_custom_fields', $screen->id, 'normal');
	//Hide the "Lead Source" meta box.
	remove_meta_box('lenix_lead_source', $screen->id, 'side');
}

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