A cable management apparatus for a portable rack-mounted electronics enclosure includes a first arm portion configured to mount the apparatus to the portable rack-mounted electronics enclosure, a second arm portion rotationally coupled to the first arm portion, the second arm portion comprising a guide configured for guiding cables routed to electronics housed within the portable rack-mounted electronics enclosure, and a latch mounted to the first arm portion or the second arm portion, the latch being movable to a latched position for preventing rotation of the second arm portion relative to the first arm portion and to an unlatched position for allowing rotation of the second arm portion relative to the first arm portion.