You should be able to find out what server you are on (boru, starka, or stoli). If you ping that server to find its IP address (or cPanel might tell you if you expand the stats to the left), you use that IP in an A record for the subdomain. Then, add the subdomain via cPanel.
Hello,
I am marking this thread as resolved.
If you need additional assistance, feel free to create another support thread or re-open this thread. *****Thread Closed*****