For some reason I can not make heads or tails of this diagram tonight. I just bought this voltmeter ammeter from Powerwerx to monitor the 12v system on my trailer. The link on the diagram doesn’t work, and I keep confusing myself. Does the ground input come from the neg post on the battery, and the output goes to ground? Or should I splice the pos into the pos lead to my fridge, then split the neg from fridge to the input lug with the output to ground? Thanks for looking.
View attachment 65205
View attachment 65205