Be careful! If the steering wheel of your car has airbag, do not release any screw and even more do you disconnect any terminal whose protection is yellow, the air bag can be activated and cause a serious accident. Disconnect the battery cables (the 2) and wait for at least 5 minutes to download the backrest capacitors of the ECM of the airbag (the manual says a minute but for a perhaps ????) Then if you can disconnect all the terminals.
The screws that you say are those that hold the center of the steering wheel, also verify that there are no plastic covers on the back, if there are withdrawal and also the screws that there are there. There is a flexible in the center of the steering wheel, before disconnecting it, it writes its position so that it assembles it in the same way .... When you transport the airbag do it with the decorative element towards brought and separated from the body, do not let it fall and store it in the same way with the decorative element upwards