MSI X299 PRO Manuel D'instructions page 32

9. Insert the M.2 XPANDER-Z GEN 4 card into the PCI_E3 slot.
10. Use the screw to secure the M.2 XPANDER-Z GEN 4 card.
11. Connect the PCIE_PWR1 to the power supply.
12. Connect the case's HDD LED cable to the JCASE connector.
13. Using the supplied HDD LED cable to connect the JMB connector and JFP1's HDD
pins (pin 1 & pin3).
22
Overview of Components
10
PCI_E3
11
+
+
9
12
JFP1
2
1
13
HDD LED
10
9