There's a hint in the panel at right. It shows the three different colors and a danger symbol, so... try to break it! Remember that there are cables in vertical and horizontal lines, so you must put the three colors in every horizontal and vertical direction ;)
 "Encerrada"){kind=icon}
 "Dead Frontier: Outbreak 2"){kind=icon}
 "Rebuild 2"){kind=icon}
There's a hint in the panel at right. It shows the three different colors and a danger symbol, so... try to break it! Remember that there are cables in vertical and horizontal lines, so you must put the three colors in every horizontal and vertical direction ;)