Yeah those little meters are fine for a small solar/battery setup, but not designed for what the OP wants. My kids bought me a similar one for Fathers Day, then I bought two from the usual suspects for $10 each and put my own Anderson plugs on them. The problem with them is they are using 16bit chips so will only count up to 65,536 so it’s no good for logging the total Amps over a week or so. (AFAIK anyway)