Dell OptiPlex 3070 Tower Service Manual page 42

b. Disconnect the VGA cable from the connector on the system board [1].
c. Remove the VGA module from the system [2].
Installing optional VGA module
1. Insert the VGA module into its slot from the inside of your computer [1] and connect the VGA cable to the connector on the
system board [2].
2. Replace the two (M3X3) screws to secure the optional VGA module to the system.
42 Removing and installing components