What on earth is this on my diagnostics socket

[Reed17]

Today i got my clio back after the key lost it's code, i had to order a new key which arrived and was coded, i removed my "ash tray" and found this (pictured) does anyone know what it is?

 

[Beef-Mc]

OBD port.

 

[st3ve]

It's the diagnostic port cover. lol

 

[Reed17]

Oh well now i feel stupid, it has never been there before!