The Tekonsha T-One Trailer Connector Wiring Harness requires no splicing. Simply locate your vehicle's wiring harness connector, unplug the connection, and insert the T-One Connector into the vehicle's harness. No special tools required. Fits• 2020-Current Toyota Highlander with Tow Package Includes dust cap to keep out moisture | Draw Tite Tekonsha T-One Trailer Connector Wiring Harness Toyota Highlander