I did pointing down on my TT. Figured that way for two reasons:
1) Thought by projecting them down, they'll work better when the awning's rolled up.
2) Thought it'd be less obtrusive to the look of the trailer if they're mounted on the rain gutter vs the side of the trailer.
Course, you can always have someone help you hold them up both ways to figure out what works best for you.
There's no use crying over spilt milk... unless it's on your keyboard.