Ok, i did something like https://[SERVERNAME]/phpmyadmin
and seems to work. But the server name has to be set with external domain name for each server that is being managed in the panel.
And when i created user from the main control panel, let us say i have webserver in db1.server.com. But i also created a DB user and DB on db2.server.com.
This statement has to be manually entered to enable the user to login to DB on db2.server.com from db1.server.com.
GRANT ALL PRIVILEGES ON `database-name` . * TO 'db-user'@'xx.xx.xx.xx';
This can be automated, because the panel knows the servers such as web, db and mail to a particular client.