CBM 1902A
Available on the Commodore CBM 1902A monitor.
Pinout

6 PIN DIN FEMALE at the Monitor.
| Pin | Name | Dir | Description |
|---|---|---|---|
| 1 | n/c | - | Not connected |
| 2 | AUDIO | ← | Audio |
| 3 | GND | ─ | Ground |
| 4 | C | ← | Chroma |
| 5 | n/c | - | Not connected |
| 6 | L | ← | Luminance |
Note: Direction is Monitor relative Computer.