I've only done a 1-for-1 replacement of untethered Rolec ECU to untethered Viridian ECU, and I used the Viridian manual. Main difference was the polarity of the LED uni is reversed on V, so I binned that and covered the hole with clear window. Viridian has its own built-in LED, so not an issue. But I think you're going to have to look at their diagram, and see just where that cable resistor goes, the one that identifies if it's 13A, 20A, or 32A cable being used. There's also a J1772 spec out on the web somewhere; old, but I believe still relevant. My download was called "finalsaej1772.doc". PM me if you can't find it, & i can email you a copy.