Dell DCDO, 710 H2C service manual Back View, Back I/O Connectors, see System Setup

6 USB 2.0	Use the front USB connectors for devices that you connect occasionally, such as
connectors	flash memory keys, cameras, or bootable USB devices. For more information on

(2)bootable USB devices see Boot Sequence.

	It is recommended that you use the back USB connectors for devices that
	typically remain connected, such as printers and keyboards.
7 IEEE 1394	Use the IEEE 1394 connector for high-speed data devices such as digital video
connector	cameras and external storage devices.

Back View

1	power	Insert the power cable. The appearance of this connector may differ from
	connector	what is pictured.
2	back panel	Multi-colored lights provide illumination for the I/O panel on the back of the
	LEDs (2)	computer.
		NOTE: The color of the back panel LEDs can be adjusted in system setup
		(see System Setup).
3	back I/O	Plug serial, USB, and other devices into the appropriate connectors (see
	connectors	Back I/O Connectors).
4	card slots	Access connectors for any installed PCI or PCI Express cards.

NOTE: Some connector slots support full-length cards.

Back I/O Connectors