This SATA interposer Board provides the solution for you to add TWO SSD (SSD-3 & SSD-4 Slots) to Area-51m R2, Which includes the 2.5-inch cage NVMe silicone interposer board D3P25 LS-J106P, 50-pin Cable #1 2JH8P, 30-pin Cable #2 5F1WR and all the other separate parts of screws, etc.

SATA interposer Board Part Number(s): D3P25, 0D3P25, CN-0D3P25, LS-J106P
HDD Bracket P/N: 0R24Y6, R24Y6, FDQ70_SSD_SLED_BRACKET_SUB_ASSY, AM2RE000400
Heatsink Part Number(s): 3JTF8, 03JTF8, CN-03JTF8-DBIR1-065-01B8-A00
50-pin Cable D P/N (SSD-B): 2JH8P, 02JH8P, CN-02JH8P, DC02C00NX00, FDQ70_SSD_CABLE_50P
30-pin Cable D P/N (SSD-A): 5F1WR, 5F1WR, CN-05F1WR, DC02C00N100, FDQ70_SSD_CABLE_30P

Reference list of compatible with Dell Laptop Models:
- Area-51m R2

What's in the box
1x 2.5" SATA interposer Board
1x 2.5" HDD Bracket
2x M.2 2280 Heatsink (SSD-3 & SSD-4 Slots)
1x 30-pin Cable
1x 50-pin Cable
8x Screws (M2x3)