Dell OptiPlex 3050 M.2 SATA And Chipset - ServeTheHome
If you don't buy an Optiplex with the M.2 SSD option, Dell doesn't solder the slot onto the board so you can never install one after the fact. : r/assholedesign
Install and boot from an NVMe SSD on a Dell OptiPlex 9020, 7020 or 3020