Biketronics Break Out Cable. This harness allows 2014-Up Ultra owners to access stock speaker wires without cutting any factory wires. If our radio has factory flash, and you want to be able to fade front to rear on radio, you will also want, two bt355s. BT355s come with different ends depending on application. We will be able to tell what you need from your order. If you can flash, you do not need the bt355s.