Question MSI Pro z790-P WiFi SSD Counts?

I recently purchased a pre-built PC that has an MSI Pro Z790-P but it came with a single 1 TB SSD. It was explained to me that it should be able to support another M.2 SSD, but I unfortunately could not find another slot. I purchased a second, WD 4TB NvME SSD and would like to install it. Does anyone know if this MB has a slot for it and if so, where it might be placed?
 
spec sheet says 4 M.2 supported.



"where it might be placed?"

Should be in semi-plain sight on motherboard.





4x M.2

M.2_1 Source (From CPU) supports up to PCIe 4.0 x4 , supports 22110/2280/2260/2242 devices
M.2_2 Source (From Chipset) supports up to PCIe 4.0 x4 , supports 2280/2260/2242 devices
M.2_3 Source (From Chipset) supports up to PCIe 4.0 x4 / SATA mode, supports 2280/2260/2242 devices
M.2_4 Source (From Chipset) supports up to PCIe 4.0 x4 / SATA mode, supports 2280/2260/2242 devices

6x SATA 6G
 
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spec sheet says 4 M.2 supported.



"where it might be placed?"

Should be in semi-plain sight on motherboard.





4x M.2

M.2_1 Source (From CPU) supports up to PCIe 4.0 x4 , supports 22110/2280/2260/2242 devices
M.2_2 Source (From Chipset) supports up to PCIe 4.0 x4 , supports 2280/2260/2242 devices
M.2_3 Source (From Chipset) supports up to PCIe 4.0 x4 / SATA mode, supports 2280/2260/2242 devices
M.2_4 Source (From Chipset) supports up to PCIe 4.0 x4 / SATA mode, supports 2280/2260/2242 devices

6x SATA 6G
Thank you. This is very helpful.