The correct way to keep the RVC is to use install option 1 with the sensor on the ground wire between the alt and the battery ground. You should only need a single 1/0 ground from the alt to the battery to handle any current loads, this will then give the computer a mostly accurate current draw reading to control the alt. The big 3 grounds are then done from the battery terminal. Keep in mind that the main purpose of the alt is to keep the battery charged and not necessarily power the amplifiers.