Now that the playing surface plywood has been attached, the next step is to mark the three 4" circles on the plywood playing surface of each box. From one end of the box, draw a line down the center of the box (parallel to the long sides).
Next, make a mark on this line seven inches in from the end. Make another mark at 14" and a third mark at 21" in, each on the center line. These will be the centers of the target holes.
Now, adjust your compass to a 2" radius. Place the point of the compass on the 7" mark and draw a 4" diameter circle. Repeat on the 14" and 21" marks.
Mark the same three circles on the second box.