As mentioned earlier, once you know the notes which make up chords, you can use any inversion or fingering you know to play them. This may involve re-arranging the order of the notes or doubling some of the notes, but as long as the chord contains only the three note names involved in that particular chord, you are still playing the right chord.
The following example demonstrates the previous progression written as an S A T B arrangement. Any time you see a chart containing chord symbols like the one previously shown, you can write a vocal harmony arrangement from it in this manner.