The original tourer camera as supplied by sean fitted above the number plate between the lights. When mine packed up I found a replacement on the bay for £8.00. Very similar to
this.
As long as you don't let anyone grab the camera instead of the tailgate release it's fine. I do know members have fitted alternatives. You can see the camera type in the image. The one I have posted the link to is a little wider so cannot confirm it would fit as well but there are plenty of the original type to be found on bay and amazon.