You can either angle it or not. I didn't, but i also used different boxes. Had i actually used project boxes or something other than tupperware, i probably would have angled it. Where did you find those project boxes? I couldn't find any that came as close as i wanted to the tupperware dimensions lol. Likely i will mod my radio to add a speaker inside of it. I used the cardboard photo storage box, added a couple of layers of Mod Podge for weather resistance. So cutting into the box and adding a speaker will be easy