One fuse is already lit when the puzzle starts. The fastest method to complete the puzzle is to click once on every fuse around the lit one. The order doesn't matter.

Here's how the puzzle looks at the start (o=dark fuse, x=lit fuse):
oooo
oxoo
oooo

This is the same diagram, but every fuse you need to click is marked as 1:
111o
1x1o
111o

123o
4x8o
567o

Нажимаем поочередно, как указано - (x)икс, где уже горит красная кнопка предохранителя.