Dell 23.8" OptiPlex 7410 All-in-One Desktop Computer (Gray) - Manual (Page 61)

Steps
1. Remove the screw (M2x3.5) that secures the M.2 2280 solid-state drive to the system board.
2. Slide and lift the M.2 2280 solid-state drive from the solid-state drive slot (M.2 PCIe SSD 1) on the system board.
Installing the M.2 2280 solid-state drive in M.2 slot 1
Prerequisites
If you are replacing a component, remove the existing component before performing the installation process.
About this task
NOTE: This procedure is only applicable if you are installing an M.2 2280 solid-state drive into the solid-state drive slot (M.2
PCIe SSD 1) on the system board.
NOTE: Ensure that the M.2 screw mount is in the proper location to install the M.2 2280 solid-state drive, refer to Location
of the screw mount on M.2 slot 1 .
The following image(s) indicate the location of the M.2 2280 solid-state drive in M.2 slot 1 and provides a visual representation
of the installation procedure.
Removing and installing Customer Replaceable Units (CRUs) 61