This is a simple clip-on strain relief to help keep the wires from breaking because of flexing over time. Its intended to use with the split cable covers as shown and a single zip tie at the base to hold the wires and cable cover in place (I hadn't added the zip tie yet at the time of the photo). The clips are an unsupported overhang but they are small enough my printer had no trouble printing them. Because of the way the arms are printed they are somewhat fragile so install it with care but after it's installed they will hold tight.