How to keep the ports static with multple user session

[Jakes09]

Good day everyone.

I have a classroom with a mix and match 32 computers.
About 8 NUCs and then 4 servers with NComputing clients.
The servers and NUC are all on static IP addresses.
In my configuration I reference to their IP address and not computer name.
The Ncomputing clients are being linked by serverIP:port (11001 -11106)
Now everytime the clients are restarted they get a new session ID which then changes the port nr.
Is there any way I can change the Remote Desktop User to have the same Session ID so that the port doesn't change on startup?
Which changes/settings would I need to do?
Everything works, the screens just switch on startup on the Veyon master.