Since the version 188.8.131.52, A new Table implementation has been released which contains Connect tab so tables could be connected with any ShortPoint connection type.
Check our support article for more information.
For previous versions:
The Connect functionality in the Table element is currently limited. Please find the Connect field and connect the Table to the source list/library from there. It will only allow you to choose from the assets of the site you are currently in (you will not be able to reach assets from other sites or site collections).
We plan to upgrade the Connect functionality for the Table element in one of our future releases.