Hey Stephen,
This unfortunately sounds like a question related exclusively to the theme you are talking about. We unfortunately do not offer any advice about or support for third-party software here on the forums.
Can you clarify what the specific, exact role of The Events Calendar or one of its add-ons has here? If you are, for example, trying to customize an aspect of The Events Calendar to work with the widget you mentioned, then the feature you are trying to implement is likely “possible” to exist, but would require custom coding. Custom coding is one other thing that we unfortunately do not offer support for, but if you elaborate on your specific question a bit I will as much as I can! 🙂
Thank you,
George