Flip the console over so the bottom is facing up.
Use a T8 Torx Security screwdriver to remove the three black 7mm screws in the back panel. (7000-series models only); or one 7mm screw (the middle one) with 7100-series models and the warranty sticker to the left.
Remove the bottom cover in the same way as the top cover. Grip the cover on both sides and pull up until it clicks. Then slide the cover off; With 7100-series models, pay attention to the two clips that replace the corresponding screws.