Anyone know what this is for ? From a Neff fridge

Bought a couple of Naff fridges and both come with this

Doesn’t feature in the usual hieroglyphic installation sheet, nor their user manual. Doesn’t appear on their spare parts list on their website. Will give them a call tomorrow (Monday) but quite prepared to be told again “We can’t tell you that as it’s against Health and Safeyy’….as they have done on a previous occasion regarding their dishwasher (the question was ‘How high does it need to be adjusted under a counter’).