Nothing
Follow the typical steps to import & establish project, plus
Create tokens for each user (and copy to the server's credential file)
Make sure the plugin on your test server is updated to the correct project_id
value in the delete sql.
The sql is in wipe-project-redcapr-dag-write.php.
Any scripts or data that you put into this service are public.
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.