WooCommerce Waitlist

Hello,
I installed WooCommerce Waitlist and found that your plugin support the Waitlist Mailout template, but I can’t understand how I can insert, for example, the link to product in the body.
Default body text is “Hi There,” and is the only text that appear in the body of sent notifications. I delete the “Hi There,” and nothing is written in the body.

Can you help me?
Thanks.