You can document a harness assembly in a nailboard drawing or a standard Autodesk Inventor assembly drawing.
A nailboard is a 2D flattened representation of the harness assembly that is used in the manufacture of a wire harness, cable, or ribbon cable. In a nailboard, all harness wires, cables, and segments are flattened and drawn as straight lines in their original display colors. Ribbon cables are flattened and drawn as rectangles with appropriate lines indicating any folds. The work points defined in 3D translate to 2D points that can be used to arrange the harness shape. The relative positions of the work points from 3D to 2D are maintained, including the distance between any of the two points.
The 2D view and the drawing often contains annotations, such as a bill of material, parts list, wire list, views of connectors, dimensions, pin numbers, and other attribute data.
Changes to the harness are reflected in the nailboard the next time it is opened within the harness assembly, unless the assembly is set to defer updates.
You can also document the cable and harness assembly in a standard assembly drawing and either sweep the harness objects or include them as centerlines.