I have a 2005 yukon xl and am looking at doing a big 3 upgrade. My question is, there is a box on the negative battery cable of my truck. if I do the big 3, do I need to run the grounds thru this device? I think it is for the Stand alone Voltage Control, that is designed to adjust alternator output as needed and keep the battery charged at 80%. Will running the grounds away from this effect my truck's charging system?