Orientation and main components
| T | Top | 6 | 3RU Fan Tray |
| F | Front | 7 | Rack Ears |
| 1 | On/Off | 8 | Chassis |
| 2 | Front Panel Knob | 9 | Motherboard |
| 3 | VFD Display | 10 | Top Cover |
| 4 | Front Cover Assembly | 11 | Power Interposer Assembly |
| 5 | Front Brackets |
15.1 S3 unit Overview
| T | Top | 6 | 3RU Fan Tray |
| F | Front | 7 | Rack Ears |
| 1 | On/Off | 8 | Chassis |
| 2 | Front Panel Knob | 9 | Motherboard |
| 3 | VFD Display | 10 | Top Cover |
| 4 | Front Cover Assembly | 11 | Power Interposer Assembly |
| 5 | Front Brackets |