Dell OptiPlex 3000TC Service Manual page 38

1. Coin-cell battery
3. Optional I/O cable connector (USB 3.2 Gen 1 Type-C port
with DisplayPort Alt mode)
5. WLAN card connector
The following images indicate the location of the system board and provide a visual representation of the removal procedure.
38 Removing and installing components
2. Optional video connector (HDMI/VGA/DP port)
4. Memory module slots
6. M.2 220 solid-state drive connector