It's set there, however I can still access the panel from any domain on the panel and in IIS the binding is currently set to all IP addresses and no hostname.
As InderS meant you can just go to Internet Information Services (IIS) Manager (found at C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Administrative Tools)
Expand your computer name and sites click PleskControlPanel then at the right side click Bindings... click add
You will know what to enter.
Of course don't forget to add a firewall rule if you use one and you should do that in the plesk control panel so it will remember in future.
After you have added the firewall rule restart your server to apply the changes.
These were done in Plesk 12. I also apologize if I replied to the wrong topic which is for 11.x but the way to set up is same compared to 12.x.