My neighbor hooked up his wires wrong when attempting to start his outboard with one of his trolling motor batteries. He brought me this and asked me if I could fix it. He said it is from under the dash and is for the gauges. I’m sure I can fix it after I figure out what it is. The boat is a Tracker Avalanche, not sure year. It looks to me like a ground wire junction block of some sort.
Any help would be greatly appreciated.