I thought I saw somewhere on here that someone used a wire from a BT cause it was just a little bit longer than the front sportster wire. Maybe fron a dyna or a v-rod... I used the stock front wire and just bought another front one for the rear... it worked for me.

 

As posted earlier. The 'Rocker C' wires fit perfect....

 

here is a pic from my setup. idk if it will help but oh well

 

Ha Ha! That's where I read it... I must be losing my short-term memory.