Kia Soul Trailer Wiring | etrailer Best 2016 Kia Soul Trailer Wiring Options. Today we're going to be taking a look at the best wiring options for your 2016 Kia Soul. Here we have the Tekonsha T-One vehicle wiring harness, and over here we have the CURT vehicle wiring harness. Kia Soul Trailer Wire Harness and Connector - Best Trailer Order Kia Soul Trailer Wire Harness and Connector online today. Free Same Day Store Pickup. Check out free battery charging and engine diagnostic testing while you are in store.