Yes you can use a WS5 as KDS
You need the following thing changed ( i assume you had a DisplayController for the KDS with a external TouchScreen)
- Network Node change Workstation Type to Workstation4 for CE Tills (DC is for Display Controller and you do not see anything in the CAL) Workstation is for every WIN32 OS like Winxp,win7,win10.
- RELOAD DB in the Control Panel
- Restart Micros CAL Service in the Windows Services
- Now you will see the KDS in the Reconfigure CAL