reServer i31125 - Using M.2 (NGFF) Key B+M To Key M Adapter for using NVMe drives

I have a question on reServer i31125.

Can the B-Key slot (with PCIe 3.0 x2) be used with m.2 M-Key NVMe drive using the M.2 (NGFF) Key B+M To Key M Adapter?

My understanding is the B-Key slot is connected to the PCIe Lane and does not have SATA controller, so ideally it should work. Please correct me if I am wrong.

Any help would be appreciated.

Link to the Adapter below:
New Version M.2 (NGFF) Key B+M To Key M Adapter for PCI-E Bus SSD Supports 2242/2260/2280 Type M.2 Key M SSD Dimension