How to install a halfsize mSATA SSD in a PCIe slot in a

I have a mini PC which has an mSATA and a USB WiFi WWAN slot Below is a picture with the board and its slots I want to know is there is

adding a mini PCIe card or rather an mSATA SSD, however couldn't really find any specs for the mini PCIe slot except it's a 52 pins

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slot space PCI Express · Non-standard video card form factors · Pinout · Power · Slot power · 6- and 8-pin power connectors · 12VHPWR connector · PCI Express Mini Card