Right you are! I didn't see the title of it. The angled piece is one side of the 4 sided sloped top. and the holly design piece is one side of the 4 sided box.
This is my take on the design: The cap is bigger than the box and will sit on top of the box with the 4 corners of the cap overhanging like a roof so you wouldn't be able to use it as an electrical lantern because you'd only be able to attach the roof to the box where the roof touches the four corners of the box (not sturdy enough to hang) Otherwise, you would need to resize the cap to fit exactly on the base and then you would be able to solder it all around.
If I were to make it, I would make it as a candle shelter with the bottom closed like a box and the "roof" as a removable top. Still not sure that there would be enough open air space for a candle. Maybe write to the author of the pattern? Maybe there's a metal frame with a door hinge that the glass pieces fit into? Or maybe I'm just confused.
