Cable duct (300, 600, 700) for equipping container structures, comprising: at least two holding elements, wherein the holding elements each comprise: a fastening region for fastening the holding element to a fixing rail of the cable duct (300, 600, 700), a receiving region with at least one receiving recess for receiving the connecting element for the optical waveguide, wherein the fastening region has at least one hole for fastening the holding element to the fixing rail, wherein the fastening region is arranged in a first plane and the receiving region is arranged in a second plane and the first plane and the second plane intersect, and wherein a first end of the receiving region and a first end of the fastening region are connected, wherein the cable duct further comprises: a C-shaped fixing rail formed in such a way that the holding element can be fixed to the fixing rail, at least two optical waveguides which are arranged next to each other along the cable duct (300, 600, 700) and are connected at their ends in pairs to a connecting element, wherein the cable duct (300, 600, 700) has two open ends, and wherein in each case one of the connecting elements of the optical waveguides is held in one of the receiving recesses of holding elements arranged at opposite ends of the cable duct (300, 600, 700), characterized in that the receiving recesses each have an opening at one end of the receiving region, and in each case one of the holding elements is arranged at a distance in a range of from 5 cm to 20 cm from one of the ends of the cable duct (300, 600, 700). at least two holding elements, wherein the holding elements each comprise: a fastening region for fastening the holding element to a fixing rail of the cable duct (300, 600, 700), a receiving region with at least one receiving recess for receiving the connecting element for the optical waveguide, wherein the fastening region has at least one hole for fastening the holding element to the fixing rail, wherein the fastening region is arranged in a first plane and the receiving region is arranged in a second plane and the first plane and the second plane intersect, and wherein a first end of the receiving region and a first end of the fastening region are connected, wherein the cable duct further comprises: a C-shaped fixing rail formed in such a way that the holding element can be fixed to the fixing rail, at least two optical waveguides which are arranged next to each other along the cable duct (300, 600, 700) and are connected at their ends in pairs to a connecting element, wherein the cable duct (300, 600, 700) has two open ends, and wherein in each case one of the connecting elements of the optical waveguides is held in one of the receiving recesses of holding elements arranged at opposite ends of the cable duct (300, 600, 700), characterized in that the receiving recesses each have an opening at one end of the receiving region, and in each case one of the holding elements is arranged at a distance in a range of from 5 cm to 20 cm from one of the ends of the cable duct (300, 600, 700). a C-shaped fixing rail formed in such a way that the holding element can be fixed to the fixing rail, at least two optical waveguides which are arranged next to each other along the cable duct (300, 600, 700) and are connected at their ends in pairs to a connecting element, wherein the cable duct (300, 600, 700) has two open ends, and wherein in each case one of the connecting elements of the optical waveguides is held in one of the receiving recesses of holding elements arranged at opposite ends of the cable duct (300, 600, 700), characterized in that the receiving recesses each have an opening at one end of the receiving region, and in each case one of the holding elements is arranged at a distance in a range of from 5 cm to 20 cm from one of the ends of the cable duct (300, 600, 700).