This video will give you an idea how it goes together- basically pop the trim off, then there are two screws to undo to separate it from the seat back. It’ll be a bit fiddly to take off the two wires and reattach onto the new one, but not too bad.
https://youtu.be/AUQcISpb5VE
Then here’s a replacement
https://www.ebay.co.uk/itm/Genuine-V...-127635-2958-0
Cheers