This item allows the connection between an older style 60 series wiring loom and newer style 30 series USB and ULTRA accessories. It’s a cost effective way of replacing one of your older kLite devices with a newer one—without replacing your harness and the remaining working device. Do not use dielectric terminal grease on the yellow end connectors of the kLite system - these are waterproof by design and the use of dielectric grease here will make the kLite friction-fit connectors vibrate loose on the trail. If you need application help, shoot the Jefe an e-mail with some pictures of your setup and a description and we can help troubleshoot the compatibility.