In order to read off the configuration as R or S you need to orientate the molecule so that the lowest priority group (#4) is away from you, then if #1-#2-#3 is clockwise it is R.
If you don't want to turn the molecule so that #4 is away from you and it is pointing towards you then you can read off #1-#2-#3 and if it is clockwise the centre is reversed to S.