SSD slot in Dell 24 All-in-One Desktop

Hello,

I've got a question regarding the number of hard disks in the 24" All-In-One.

It says under STORAGE that the system is equipped with an 1 TB M.2 PCIe SSD.

At SLOTS (marked in blue in the screenshot) it says there is 1 M.2 2230/2280 for PCIe SSD.

Am I right that this is an ADDITIONAL Slot for a second SSD (which I would need to buy an install separately, of course)... I definitely need more than the 1 SSD with 1 TB which comes with the system.