From the DCC++ documentation, videos and GitHub it is recommended to "cut the trace" on the back of the motor shield when supplying more that 12v of power to the Base Station. What exactly does "the trace" refer to? The two traces from the two pads to the pin or the area between the two pads. Please see attached photo. I've already scraped away the two traces from the two pads to the pin. The base station still works but have I really cut the traces I needed to?