this is the cradle you want. link

you can attach any short arm and base. there should a recommended base that pops up in a related window, that's the one i got, it works great. it's short and flexible enough to work right up by the rear view mirror, which gives you a good angle for the video cam.

It would seem to me this would be a much popular and widespread ODB2 connection. at least it is with me! and it provides WIFI.