Make sure that your HubSpot user is a Super Admin.
Create a Private App.
Enter the app Name and Description:
Add the content permission scope:
Create the app and copy the API token:
In SEObot, open Menu -> Connect my Blog -> HubSpot and fill out the connection form:
Set the Auto-Publish Articles setting. What is the Auto-Publish?
Click the Connect button at the bottom.
Note: If you have any style issues, follow the instructions HubSpot - How to fix styles?