Confusion of booting from NVME SSD M.2 Drive

[Fishinforfacts]

I have just bought a HP Prodesk 600 G2 and have been researching booting from PCIe SSD drives.  I have not received the computer yet, but should receive it Thursday. I read this forum thread and  it makes sense, but seems to only apply to the Mini  based on an excerpt from the following table from this link.

SLOTS                                             DM                                                   SFF

Turbo Drive G2 (M.2 PCIe)     1 - M.2 PCIe x4-2230                    N/A
                                                    (for WLAN)

                                                    1 - M.2 PCIe x4-2280
                                                   (for storage)

PCI Express x1 (v3.0)                 N/A                                         3 -2.5"� low profile
                                                                                                        6.6"� length
                                                                                                        10W max. power

PCI Express x16 (v3.0)            N/A                                           1 - 2.5"� low profile
                                                                                                               6.6"� length
                                                                                                                35W max. power

Based on this it appears that I need to buy a NVME adapter M.2 PCIe SSD to PCIe x4/x8/x16 converter card. Is this correct, or does the machine directly support the NVME M.2 SSD?  If it supports it directly, which slot do I use? Thanks for your assistance.

[DGroves]

you have already answered your own question, the specs you posted cleary show two m.2 slots on the motherboard, one is used for the wireless and the other is used for a storage device (ssd) in the 2280 size format

this model is available in several form factors

please look at the HP quickspecs for your model for more information on the exact model you bought

https://www8.hp.com/h20195/v2/GetPDF.aspx/c04818340.pdf

a m.2 connector can be on a motherboard or on a pci-e card as it's just a connector and this conector can be wired up in several different ways with both PCI and PCI-E being commonly used