From the "manage domains" page in the panel, look at what "user" appears for that domain in the "web hosting" column. Log into that user and you will be placed in that users home directory (i.e. /home/USER where USER is the actual user name). In that directory you should see a DOMAIN.COM directory i.e. /home/USER/DOMAIN.COM ) what's placed in the DOMAIN.COM directory is the root of your website DOMAIN.COM.