Put on gloves to protect your hands.
When prying with a flat-tip screwdriver, wrap it with protective tape, and apply protective tape around the related parts, to prevent damage.
Use a plastic panel removal tool to remove interior trim pieces to protect from marring the surface.
Take care not to bend or scratch the trim and panels.
Remove the lock hook (B) and then remove the rear seat armrest (A).
Press the rear seat armrest (A) in the direction of the arrow in the below picture, and then remove it by pulling it up.
Rear seat armrest installment
Install the cap (A) on the side part of the armrest.
[LH]
[RH]
Put the left side part (A) of the armrest into the hole (B).
Push the armrest (A) sidewards in the direction of the arrow, and then install it.