Lenovo 10111/4725 Maintenance Manual page 34

1. 12V power connector
2. Microprocessor and heat sink
3. Microprocessor fan header
4. Memory slots (2)
5. Thermal sensor header
6. Mini PCI-E slot
7. Power connector
8. Power fan header
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Lenovo H505/520/535Hardware Maintenance Manual
9. SATA connectors (3)
10. Front panel connector
11. Front USB connector
12. Front USB connector
13. Front audio connector
14. PCI express × 1 adapter slots (3)
15. PCI express × 16 adapter slot
16. System fan header