Use jQuery to move a Sponsored Seats field on the Checkout page

move-something.js

jQuery(document).ready(function($){
    $('#pmpro_extra_seats').appendTo($('#other_discount_code_p').parent());
});

pmpro-move-sponsored-seats-field.php

<?php
/**
 * Plugin Name: PMPro Customizations 
 * Plugin URI: https://www.paidmembershipspro.com/wp/pmpro-customizations/
 * Description: Customizations for positioning Sponsored Seats field on the checkout page. Add this php file and .js file to Customizations plugin's folder.
 * Version: .1
 * Author: Paid Memberships Pro
 * Author URI: https://www.paidmembershipspro.com
 */

add_action( 'wp_enqueue_scripts', 'enqueueing_just_on_checkout_page' );
function enqueueing_just_on_checkout_page() {
    global $pmpro_pages;
    wp_register_script( 'move-something', plugins_url( 'move-something.js', __FILE__ ), array( 'jquery' ), '1.2' );
    if ( is_page( $pmpro_pages['checkout'] || $pmpro_pages['confirmation'] ) ) {
        wp_enqueue_script( 'move-something' );
    }
}