I know I'm dangerous so I thought I would ask before I try this. I have a 12v power inverter and I just loaded Megatune 2.25 onto my OLD trusty laptop. All I really want to do is establish that I CAN communicate between the two (maybe retrieve the VE table from it or something similar). From the diagram I get that wires 7,8,9,10,11, and 15 are grounds and wire 28 is just straight power. No fuse but I've used the inverter many times and never burned anything up yet and don't plan on crossing any wires. Is this a sound idea? Why so many grounds? Thanks.