I had my first accident EVER on a bike because of this darn thing. Been riding since I was a kid and I am 44 years old. I pulled it out. I also hated the fact that I couldn't bleed my brakes without taking it to Harley. Here is a photo of the fitting I used to connect the 2 lines. Got the fittings at O'Reilly. You need 2. One for front and another for the rear.