Hubs Step
In this step, you specify a list of the hubs constituting your site. Each hub must be provided with a unique name, which is used to identify the hub in the subsequent steps and in the results. For additional information, see the Hubs section.
Add a Hub With GIS Add-on:
https://www.youtube.com/watch?v=w-XKBjAswL0&t=28s&ab_channel=UrbanSympheny