These mazes are on the opposite sides of each other, and are thus mirror images. Look at the bottom one with the white border, and start in the bottom right where the yellow path comes out. Follow your way through on the yellow and orange path until you come out the top left. Or, start on the left side and follow the green and orange path until you come out the right side. Thus, two mazes on one grid.
Since most of the cube art is one-sided, its easy to do. This was two sided, so a bit trickier, but because the mazes are mirror images, they are easier than having two different images on both sides.