You can do as fivefinnishfarmers did You only need the upper part of schematic!
You find it around the middle of post 1.
https://onedrive.live.com/?authkey=!AHnhw6mFnSn6gS4&cid=A23BBF94342BFE2A&id=A23BBF94342BFE2A!2077&parId=A23BBF94342BFE2A!2055&o=OneUp
Thread here:Case IH Puma 230, autosteer ready