A cable device includes an elongated transmission member that defines a central axis, outer cover, and illumination element. The outer cover has an outer surface and a bore along its length. The illumination element extends in a direction parallel to the central axis and along a length of the transmission member. The illumination element has first and second exposed portions extending through separated openings of the outer surface of the outer cover. Each of first and second cross-sections of the respective first and second exposed portions define respective first and second illumination element central axes extending through the cross-sections in one or more directions transverse to the central axis of the transmission member. The illumination element is configured to convey a given light such that the given light that enters the first exposed portion of the illumination element exits the second exposed portion of the illumination element.