Embodiments disclose a holding part for fastening electrical wires to a vehicle with at least one first shell element and at least one second shell element, which is formed separately from the first shell element. At least one fastener is attached to or is integral to one of the shell elements and is configured to couple with an opposing element. In addition, there is at least one bridging element connected to one of the shell elements The first shell element and the second shell element form a receiving space between them for the wires when joined together, which is divided by the bridging element that extends through it to form at least two bundles of wires. Additional embodiments disclose a wiring arrangement with such a holding part, and a method for fastening electrical wires to a vehicle.