1) Install the WordPress plugin from here and activate them. Upon activation go to Settings-> HelpNinja
2) Go to Help Ninja Dashboard Manage -> Apps -> WooCommerce and click Add New Page
3) Enter the store URL and then select the mailbox and click Add
4) Once added copy the access token.
5) Paste the access token and click "Save Changes" and that's it. You should see WooCommerce details of a customer on the right side widget.