Mumblegit

Could someone please help me to identify this part please, which has just fallen on to the carpet in the front passenger seat of my 2007 Micra 1.2 Acenta BVA ? What does it do? How do I put it back? What will be the consequences if I do not? I have asked Nissan france to help identify it, but they have refused. The say "Nissan Cares". You must be joking, not in France they don't. Will be grateful for any help you can give. Thanks.