Rick....(large pictures below)
It's ugly under there - especially now. Wires, other than those going directly to the AMPS Gauge were impacted - all the damage appears to be under the dash.
Yes, wires that burnt where white or yellow - but also a large black wire that comes directly from the AMPS Gauge (my brother informed me that that's a 'hot wire' - that's also the wire that ended up with no black coating at all (under the dash) - completely fried but it's OK on the firewall side.
Question - is a voltage gauge from SW wired in the same as an AMPS Gauge?