Ah yours is just like mine, with the back door off remove the two large flathead screws, this locks the drawer in place from the back, but the shelf does NOT come out through the back. Go back to the front of the machine, near the control panel (depending on if an operator added any extra, are about 6 screws, 4 on the front, either side of the CP along the edges, and two on the sides of the cab facing inward. Remove them, the cp, and board will slide toward you. Leave the back door OFF as sometimes interconnects can get caught. and you want to be able to see while you work.