The kit is installed in /xterminals/root.
Each X terminal has a private directory in /var/xterminals. When configuring an X terminal, this directory must be read-write (NFS server). The X terminal will create itself its own private directory there, using its IP number as the name of the private directory.
Once configured, the private directory may be turned back read-only. During normal operation, the X terminals do not need any write access at all to the NFS server.