I purchased a standard lokar cable. I also called TWM (
http://www.twminduction.com/Home/Home-FR.html) and order a adjustable screw on end piece. Works great no problems.
To install it I found it is easier to remove the middle piece this fits into, it is three screws, then slid it out the back. Once I had it back together I was able to adjust the cable length (with a long screwdriver).