I'm not sure what they would attach to but would be cool. . .
One would imagine the rear view mirror that doesnt exist because...(insert cool sounding excuse)...and dont use real life arguments about current modern cars having cameras installed into the rear because that just makes the future look like regression more than progression.
One has long been asking fer this exact thing...I like the weird and the wonderful and the plain downright crazy individual stuff, and this would prove once and fer all that frontier do have an actual sense of humour...
Which is why fluffy dice will never exist...and thats a shame as that would be the answer to all the games woes and trials in all 3 modes I believe ^