See the figure in Prepare to Install a Standard PDU, panels 3 and 4).
The PDU is held in the rack by gravity, with the standoff bolts resting in the mounting brackets' keyhole slots.
For extra durability, secure the PDU to the mounting brackets using the shipping screws and washers (two screws and washers per bracket). If you plan to ship the rack to another location, you must secure the PDU using these shipping screws.
Route the power input lead cords either down through the bottom of the rack or up through the top of the rack, depending on where you plan to connect them to the main power source.
If you are routing the cables through the bottom of the rack, refer to the Sun Rack II User's Guide for the dimensions of the floor cutout.
Caution - Never twist, kink, or tightly bend a power input lead.
Routing standard PDU cables up through the top of the rack.
Routing standard PDU cables through the bottom of the rack.
Caution - If you route power input lead cords through the top cable window, do not rest the cables on the plastic sliding doors.
Install these brackets near where the power input leads exit the rack (see the figures in Step 3).