i want to set default value in many2many field for example:

that field in models.py:
# alarms
alarm_ids = fields.Many2many(
'calendar.alarm', 'calendar_alarm_calendar_event_rel',
string='Reminders', ondelete="restrict",
help="Notifications sent to all attendees to remind of the meeting.")
also it is default values created by system, and i want first variant by default:

i know that i can set it by id, but dont know how.
