: The original Dell cases for this motherboard typically lacked a reset button. You can leave your new case’s reset switch disconnected or use it elsewhere, as there is no dedicated reset pin on this header.
: Unlike LEDs, the power switch (Pins 5 and 6) is not polarity-sensitive; it simply bridges the two pins to boot the system.
: These are standard 9-pin headers located elsewhere on the board and are usually compatible with aftermarket case cables. Inspiron 620 Service Manual - Download.dell.com
: Dell BIOS often checks for a proprietary ground loop. If your system reports a "Power Button Cable Failure" at POST, you may need to bridge Pin 8 and Pin 10 to simulate the presence of the original Dell cable.