I'll try to add a bigger shot of the roll, but to complicate things, I started the roll in one Holga then switched it (in the darkroom) to another because the shutter didn't sound right. So the first 5 shots are in a camera with a different problem.
I thought of the side and will tape that for the next roll, but light would have to go through the backing paper to strike the film from the sides. And I'd think it would get what's on the reel more - though now I wonder if that's where/when these frames got hit. It's mainly the ones that could have been sitting there waiting to be shot. Hmm, I might have just figured it out.