On the R640 10 bay is an expansion board that sits in front of the backplane. This is the power cable that routes from the expansion board to the left rear of the chassis. It plugs into the J_BP2 power connector.
On the cable itself is an end labeled EXP. This plugs into the expansion board. The other end plugs into the J_BP2 connector as show below. Connector is right below J_BP1. Note, cable not shown. Only the connector.
PCIe RAID cable compatible with the R540 8 Bay LFF server. Cable has just enough length to reach the R540 internal riser designed for a PCIe RAID controller.
These cables supply PCIe connectivity for NVME drives on the R640 10 Bay server. They enable NVME on drive bays 2 – 5. One end connects to the backplane on ports A1/B1. The other end terminates at the rear of the chassis on ports M1/M2.
PERC cable for the R640 10 Bay. It connects to the backplane and then terminates at one of Dells Mini Mono RAID controllers.
Here it is installed in the server. It routes along the right side of the chassis and has just enough length to reach the mini mono controller (mini mono RAID not pictured):
This is the cable to connect the backplane to the onboard SATA controller on the R740 8 Bay LFF chassis. Keep in mind you will only be able to use SATA drives with cables like this. If you want to use SAS drives you’ll need this cable (or a PERC cable) as well as a proper RAID/HBA controller.
One end of the cable attaches to the backplane. The other end plugs into the onboard SATA ports located right where the PERC mini mono raid controller would install:
