The User's Guide is correct. What is needed is a splitter or" Y-connector" (part number 6400-1012-00) on one of the power connectors and that will allow two devices to be powered from one power connector.
Make sure the splitter is seated on completely in order for it to work properly.
The minitower's 200-watt power supply will adequately power the additional device without deterioration of the computer's performance.
If there is no "Y-connector" inside the computer, contact Power Computing's Technical Support and one can be mailed out.
Machines Affected: NT (Minitowers) enclosures.