I preferred on the side as made the most of the gold bling but I seem to be in the minority. Nice bit of kit though, wherever you put it!
Personally I think it would look better on my bike Looks good in either place. I wouldn't worry about the rozzers they can see it from the kerbside if they look hard enough. Mine is hidden behind the subframe near seat lock. Can just see the date nothing else. I had no probs with that when got stopped for routine road side checks.