You replace the Seimitsu RE Mounting Plate using now, with a Seimitsu SS Mounting Plate.
You mount the Seimitsu LS-32 side to side, instead of the top and bottom right now.
The Seimitsu SS Mounting Plate is how to correctly mount the Joystick.
The Seimitsu RE Mounting Plate is for different situation.
Because you had gotten the Seimitsu LS-32, it comes default with RE Mounting Plate.
The Seimitsu LS-32-01 comes default with SS Mounting Plate.