Does anybody know for sure what the reverse light wires are and how many?

I have a 2011 estate and had a quick look earlier but didnt have much time before it went dark.

I opened the flap behing the light cluster within the boot and could just see all the wiring plugs. The one furthest down closest to the reverse light had 3 white wires in the plug but not sure if those are it? Not sure if the reverse lamp was further down and couldn't see the wires....just want to find the ones to attach the 12v and ground to?