Dell OptiPlex Micro Form Factor Installation Manual page 29

Table 1. Compatible AC adapters (continued)
180 W AC adapter
8. Lift the monitor and insert the slots on the VESA mount into the hooks on the monitor arm until it clicks in place.
9. Tighten the screw (M4x12) on the monitor arm to secure the monitor to the monitor arm.
OptiPlex Micro Dual Vesa Mount 29