Dell Vostro 3020 Service Manual page 46

1. Processor-power cable connector (ATX CPU1)
2. Processor socket
3. Processor-power cable connector (ATX CPU2)
4. Processor-fan cable connector
5. Memory module slots
6. M.2 2230/2280 solid-state drive slot
7. Power-button cable connector
8. Media-card reader cable connector
9. System-board power cable connector (ATX SYS)
10. M.2 wireless-card slot
11. Optical-drive data cable connector (SATA-3)
12. Hard-drive and optical-drive power cable connector (SATA PWR)
13. Hard-drive data cable connector (SATA-0, boot drive)
14. PCIe x16 slot (SLOT2)
15. PCIe x1 slot (SLOT1)
16. Coin-cell battery socket
The following images indicate the location of the system board and provide a visual representation of the removal procedure.
46 Removing and installing components