Hi davout,
Yes we are aware that some of the documentation could be a bit incomplete but we work everyday to improve it!
Anyway we have a demo regarding the taskTemplate property of the SmartKanban which I think is exactly what you need for your use case.
Link for the demo:
Let me know if that works for you!
Please, do not hesitate to contact us if you have any additional questions.
Best regards,
Yavor Dashev
Smart UI Team