IIRC it doesn't have one, which could be why you can't find it! The instrument panel should light up with "
OK" when you switch on, and stay illuminated for about 30 secs before reverting to trip milo readout.
At least that's what my wife's W-reg 1.4 Alize does.
My problem was finding the washer bottle, hidden right at the back when the bonnet's up, outside the engine bay, really, and with a black cap on it too.