Since you haven't got cruise, just ignore it.
(The 2 swithces are supposed to operate a little apart and in the right order as you press and release the pedal).
You can monitor it somewhere with PP2000, 'Driving Information', maybe?
2002 HDi 2.2 Exec Estate, (2008-12) (wonderful)
2003 HDi 2.2 6-speed Exec Estate (2012-19) (also a gem)
2009 Citroen C5 2.0 HDi VTR+ Estate (godawful heap)
2008 BMW E91 330i touring (great fun - murdered by a reversing SUV)
2007 BMW E91 325i touring (slower smoother quieter)
Oh ffs So you've got both the wiring and the switch but no cruise, while I have neither wiring nor switch but a stalk I want to fit but don't want to run wires across the engine bay It's there at the ecu but where it goes then is anybody's guess
If the Yoyo ever comes back from the garage I've got a wire locator to try out...