Click on "BOOKINGS"

Click on "Calendars"

Click 'Host Settings'

Click 'Remote Calendars'

Right-click on "Connect with Google Calendar / Meet" (or Outlook/Apple - whichver calendar type you are connecting with) and select "Open in new tab"

In the new tab, select the account you want to connect with. If you've got multiple accounts, repeat the process for each account.
