In a prior life, I was tasked with the boots-on-ground closet to closet network hardware audit of an office complex.
Serial numbers, model numbers, port count, etc etc. One of the duties was pulling configs from everything that could give them up.
Was it password protected without the password being known by anyone? Hold this button on the panel, connect via terminal emulator over the serial port, enter this obscure command, and then set this password after hoovering up the config.
Mostly CISCO gear, but I'd assume with hardware access anything can be changed.
Dell might just be evil though?