How to add a domain with installed WordPress to WordPress Toolkit in Plesk?

Question

There is a WordPress installed in domain's document root in Plesk. How to detect and register this instance in a WordPress Toolkit?

Answer

1.  Login to Plesk
2. Open WordPress Toolkit for a domain:
3. Click Scan:

When Scan button is pressed, WordPress Toolkit tries to find wp-config.php file in a directory with WordPress files or in directories higher.

Note: WP Toolkit can find and add two identical instances if one of them is backed up to a directory higher than a directory with WordPress files.

Note: to Scan all WordPress installations on the server, perform that same at Plesk > WordPress