How to install Samsung 970 EVO Plus NVMe M.2 250GB SSD on Dell vostro 3670 MT

Pls refer to service manual 

1. Insert the SSD into the connector on the system board [1]
2. Replace the one (M2x3.5) screw that secures the SSD to the system board [2]

Note motherboard has two M.2 slots, with one dedicated for ssd and the other for WiFi card.  The two slots have different keys. M.2 ssd slot is #16 (M.2 PCIe Connector)