Slide the sleeve over the partially completed wire. Take your time. Insome cases, it's best to constantly massage the sleeve material so itdoesn't bunch up or kink. You can tie a knot in the end of the wire(sans insulation) and pull it through the sleeve, but we prefer togently slide it over the wire. Be sure to add two sections of shrinktubing before you reinstall the boot (you'll never get the shrink tubingover the boots).