Onboard connectors + One retimer card

The following shows the cable connections for the front 24 x 2.5-inch NVMe configuration with one retimer card.

Connections between connectors: 1 ↔ 1, 2 ↔ 2, 3 ↔ 3, ... n ↔ n

Figure 1. NVMe cable routing to onboard connectors and retimer card

From	To
1Backplane 1: NVMe 0-1	1Onboard: PCIe 5
2Backplane 1: NVMe 2-3	2Onboard: PCIe 7
3Backplane 1: NVMe 4-5	3Onboard: PCIe 6
4Backplane 1: NVMe 6-7	4Onboard: PCIe 8
5Backplane 2: NVMe 0-1	5Onboard: PCIe 4
6Backplane 2: NVMe 2-3	6Onboard: PCIe 3
7Backplane 2: NVMe 4-5	7Onboard: PCIe 2
8Backplane 2: NVMe 6-7	8Onboard: PCIe 1
9Backplane 3: NVMe 0-1	9Retimer card: C0
10Backplane 3: NVMe 2-3	10Retimer card: C1
11Backplane 3: NVMe 4-5	11Onboard: PCIe 9
12Backplane 3: NVMe 6-7	12Onboard: PCIe 10, 11