Electrical plug under car. ID please

[adyadad]

Morning all.

We've just had a new transmission in my daughter's car and I've noticed a wire hanging down from the floor area in the centre. I haven't had a chance to get underneath and see where it goes yet.
It's got 2 grey wires inside a black nylon sleeve and it's been dragging on the ground. There is obviously wear on the security clip but the rest is still ok.
Can anyone ID what it is for and where it plugs in?
Apologies for the poor photos but I had to crop and compress to upload.
Everything seems to be working well at the moment.
It's in a 2015 MD diesel Ambiente wagon.
Thanks in advance.