only one switch on a standard 306. if they ever had cruise control you would find two switches on the brake and one on the clutch.
none are fly by wire directly so there are no connections to the ecu.
none are fly by wire directly so there are no connections to the ecu.
need a part number? http://public.servicebox.peugeot.com/ and http://service.citroen.com/ will sort you out.