I'm confused as to what you are working on with this 3ds speaking with words like "reattach". The only way to "reattach" that capacitor (not a fuse) is to use a soldering iron and solder. But if you don't already know how to re-solder a component, how did you expect to repair all those broken traces at the bottom right of the picture? I see at least 6 cut traces , possibly a 7th where you circled , to the capacitor to the left.
You need, a soldering iron, solder, enamel wire, multimeter to test continuity, maybe a magnifier if your eyesight isn't the best, a steady hand and patience to repair the damage shown in this picture.
If you really really want to save this 3ds , tried and find old scrap electronics that you can practice soldering to.. purposely cutting traces with a knife and trying to fix them , checking for continuity and short circuits.
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These traces are damaged and need to be repaired