One of the best TheSSS video tutorials I've ever seen.
Managing TheSSS with Webmin:
https://www.youtube.com/watch?v=Jtx97ev6ltI
Managing TheSSS with LAMP Admin:
https://www.youtube.com/watch?v=xXsS7SZRLSE
These videos are NOT in English. However, their plot is easy to understand. If necessary, you can also have a look at the 4MLinux official documentation:
http://4mlinux.blogspot.com/2017/07/...ux-server.html
.