
Same thing on the right wall. | 
To support the shelves, a vertical board was attached to each side. I used a 1x6. Before installing it, I trimmed the board to make it 1 inch narrower at the top as the side of the coach angles in by about that much from the middle of the sidewall. Also, I used my radial arm saw to cut groves every 2" at a 5 degree angle to support the shelves and slope them toward the wall so that things placed on the shelves would lean against the wall and remain stable while traveling. | 
Top right corner. | 
Here is the top left corner of the closet. |