There are some constants with finding the screws. You will find 3 screws along the bottom edge angled down towards the floor. There will be 1 other screw at the edge of the lip that runs along side the drivers cup holder, that screw is about 3 inches long and is at times very hard to get out. Take your time, don't get frustrated, if you do, walk away and come back to it once you have cooled down.
3 screws on the bottom, feel with your fingers until you come to a dimple in the board, take a drill and stick it in the whole, you should hear the difference between the dril running on plastic board vs. running on top of a screw. Once you find the screw take it easy on backing it out because they do strip out easy.