You need to remover the silver dash surround. There a couple of screws in front of the speedo you need to remove, and one screw that is covered by a small black cover next to the central vents. Pull the surround out and you should see the screws that hold the clocks in.
Youll need to get your hand around the back of it, turn dash clocks towards drivers door, 2 electrical cable sets just pull off and speedo cable is a squeeze and pull clip.