We have a new to us 2005 Viking Epic 2308 and Hope to install this voltmeter/usb Charger https://www.amazon.com/dp/B0748DPQ3J/ref=cm_sw_r_cp_api_5YKjAb0CBQDE2 Does this look like a good location to add a wire to run to a new voltmeter/USB socket? Arrow is where the black/white wires come in from the battery. It then appears to head up the canvas to the roof. I assume it’s to power the lights? We want to extend a set of wires from just under the dinette storage (with an in-line 5amp fuse) just to the outside of the u-shaped dinette and install a voltmeter/usb/12V/switch setup there. Is this a good wire to extend from? The 5amp in-line fuse should protect our devices from getting fried, correct? What gauge wire should I run? Will this location have enough power to charge two iphones? Or does that wire connect to something like the refrigerator or furnace fan? Is there a way to connect an additional line without cutting and reconnecting the original wire? We switched the 3 overhead lights to LED lights so that should draw less power. The fuse box is near the back bunk and doesn’t have room for more fuses anyway. Any other advice you can give a total newbie? (Other than to call an electrician, something that’s not really a priority in our budget right now...) I’ve been reading through the wiring forum trying to learn as much as possible but i’m not sure what these particular wires mean in our particular model. Thanks for the help! We’re hoping to go camping this weekend and would feel safer in this cold if we knew how much power our battery had left.