You can find the Diptrace file for your main circuit board at the bottom of this page. It is called Y10 new unrouted.dip
Download the file and open it in Diptrace. The connections have already been made.
All you have to do it put the tracks on the board. The tracks are the copper strips which the current flows along. Once you have used Diptrace to put the tracks where you want them, the file is sent to a machine that will make the actual board.
The video below shows you how to use Diptrace to put the tracks on your board.
Below the video is a picture of what the board should like like when you have finished. You can use this to get your board correct.