Whereabouts in the Country are you bud. There is a pinned post at the top of this section titled "are you willing to help" If you post your area folk nearby may be able to offer hands on assistance
Thinking to where you saw the white flashes, fair enough there is no burn marks, but any loose wires/connections in that area. Once the battery is charged, see if the bike will fire up and if so and ticking over, try moving wires or components from that area to see if you can replicate the flashes. If you have a multimeter put that across the battery terminals (reading volts) and see what it says, then rev it up a bit to see if this figure raises. If no multimeter, a simpler way if to switch on main beam at tick over then rev up to see if the lights get brighter. This will help indicate whether the alternator is charging the battery