Jazz (2011) - Radio Wiring - What is that three pin plug?

[guest6985]

Hi!

When I took the radio out I found the connectors I expected (and had adapters for), but additionally there was a three pin connector (with two wires present) taped up to the big connector cable. Does anyone have any idea what that was for?
 
Yes, I forgot to take a picture, but I probably can next weekend if no one recognises the description.