Blu-meanie, here is a picture of my Jordan installation. When I first installed it I had it mounted so that I needed the entire length of the cable and the cable had too many curves in it. This caused the cable to bind so that as I gradually pressed the brake pedal the reading on the display unit would not change, then all of a sudden it would jump up by 2 amps.
I ended up moving the display unit so that the cable was directly in line with the brake pedal and I made a spacer so that the bottom of the unit is out away from the knee bolster. This allows the cable to sweep in a gentle arc - no more binding, works fantastic!
Of course this puts the display unit almost directly under the steering column where you can't see it while you're driving, but I have found that to not be a problem - once the trailer is hooked up and I have the green continuity light and I press the red button to check the amperage, I never have to look at it again.