WOW... sure looks like an internal short to me... positive terminal in first pic was properly covered. with no damage showing in either cables that I can see. there were a few reports of early Shorai having internal connection issues, which have long been fixed. it's been several months now.... let us know how Shorai takes care of this... for more details on a motorcycle that caught on fire, follow LiFePO4 testing thread. should be towards first of thread.