From the roll bar installation thread:

1. move both seats as far forward as possible
2. remove the map book pouch that's between the seats it has 2 plastic hooks that slide outward at the top and 2 that slid upward at the bottom
3. There are 2 torque bit screws, I believe they are a T20 or 25 that hold the umbrella hooks once they are removed you can slide them upward to remove them.
4. on the rear bulkhead top cover there are 2 round approx 1 inch in diameter buttons they will unscrew just put some hand pressure on them and turn them counter clockwise, and the carpet behind the seats there are 2 more buttons with a head on them they also unscrew in the same fashion.
5. now you will need a T10 torque bit and remove 3 screws on the right and left metal door seal top plates buy the seat belts. then pull the door seal away from the carpet approx 16 inches.
6. now the hard part, get a flash light and look in the slot were the seat belt comes through and you will see a hidden Philips screw 1 on each side. I used a magnet on a screw driver so you don't drop them if you do good luck trying to find them. I couldn't ! Next I used a long flat tip screw diver and slid it through the slot were the seat belt goes through and gently prided upward on the seat belt cover near the rear side glass. the plastic tangs that slid in to the clips that hold them are very thin and brake easily .