When inside the Scheduler Page (click the calendar icon on your left hand menu):
Click on a booking > click assign teams > click the + icon to add the team to the booking > click done.
Drag and Drop to assign
In the Vertical or Horizontal Views on the Scheduler, you can also drag and drop unassigned bookings into the available team you would like to assign.
You'll get a pop up to confirm the assignment and how you want to save the team assignment to the series
Keep in mind that you can’t assign teams to forecasted bookings but once you assign the Team to the first active booking of the series, you will be able to save that team assignment to the series.