If the client is in an early installation state, the root password for this client is: ”NETROOTPWD”
Later, it will be the password you entered for root in the client add dialog.
If your browser supports the SSH protocol directly, then you can click on the link to connect to the client: ssh://root@CLIENTIP
Otherwise open a console and enter the command: ssh -o UserKnownHostsFile=/dev/null -l root CLIENTIP
To read the current client screen or to engage in the running installation use the command: screen -x m23install
