On the left rear, remove these three screws, #8-36, 5/16".

The screw on the right is difficult to get to. Use a long thin screwdriver to loosen the screw a tiny bit, then a smaller screwdriver to remove the screw.

The screw on the right holds down two parts.

The screw on the left has a hook for a spring which runs along the length of the machine. You will likely be able to remove a short segment of the larger surrounding spring. Hook the end of the interior spring around the bushing after removing the short outer spring segment.