Lenovo 3000 H Series User Manual page 47

Microprocessor and heat sink
Microprocessor fan connector
Memory connectors(2)
Power connector
SATA connectors(4)
Serial(com1) connector
Front panel connector
Front USB connectors(2)
Front audio connector
PCI adapter connector
PCI Express x1 adapter connectors(2)
PCI Express x16 graphics adapter connector
System fan connector
12V power connector
Microprocessor and heat sink
Microprocessor fan connector

Hardware Replacement Guide