
"MySQL host address" is your MySQL hostname or ip address, such as "localhost", "127.0.0.1".
Username and Password are your MySQL database username and password.
Port is your MySQL database listen port, default is 3306.
"Database" is your MySQL database name, such as "test".
You can connect to MySQL via SSH tunnel if you need, just check the "Use SSH Tunneling" box.

"SSH host address" is your SSH hostname or ip address, usually, the same as "MySQL host address".
Port is your SSH listen port, default is 22.
User Name and Password are your SSH username and password.