To get the embedded code for your Hubspot email:
In your Eventable dashboard, go to the Events tab
Click the Share Event button for your specific event
If you haven't already, select HTML as your email type
Select HubSpot from the dropdown menu
Copy the embed code
To paste the embedded code in HubSpot:
Go to Content, Email, and choose the
Under HTML, go to Tools and then Source code
Under Edit Source code, paste the embed code (Control+V if using Windows, Command+V if using Mac)
Save Changes
Preview your buttons in the email by clicking Preview on the left hand sidebar