According to the manwal (SE-12)
1. Slide the rear seat forward.
2. Remove seat rail cover LH and RH (1). (The bit in the middle of the boot)
3. Remove slide seat rear mountings bolts from the rear floor.
4. Remove leg cover LH and RH (1). (the middle legs)
5. Remove slide seat front mountings bolts.
6. Recline the backseat and remove the slide seat assembly from
rear door.
NOTE:
This operation requires two workers.