In the Test Case Wizard, you can select the Botium dataset you augmented in the last step and upload the user examples to your NLU engine of choice. Depending on the provider there are different options available. For example, if using IBM Watson you have to choose
if you want Botium to initialize a blank workspace
or if you want Botium to copy an existing workspace and extend it with user examples
or if you want Botium to add user examples to an existing workspace
For Rasa, Botium Box generates the native Rasa training data format (nlu.md) - you have to copy this file to your Rasa instance and start the training manually.