Reciever
You need to purchase the receiver from Landrover. I just got one, they are very proud of this part.
One thing to keep in mind though, I haul bikes long distance on a lot of trips and the only time I would ever put the bikes on the rear is for around the town and short distance.
The problem is when you go down the road all the fine dust swirls in this area and over time it makes of mess of the fine parts in the bikes. If you add rain and then a dirt road and it can take hours to clean the bike.
I roof mount exclusively and after hauling bikes for many years I only use the Yakima racks and not the fancy ones, the ones where you pull the front tire and lock the forks in will hold until the rack tears of the roof (yes I have done that).