[Tail]

Was going to say after all these years it may have just rubbed through, it happened to me on an Astra GTE years ago, smoke everywhere and the loom looked like melted cheese, turned out an ignition wire had been rubbing against a small bracket for a long time then wore through. Looking at the photo though, those wires are burnt from the terminal suggesting something shorted out in there and then it disappears into the braided part of the loom, you may have to take that apart to find out how far it goes,it could be a fair way, can you trace to the far end to see if has gone all the way along....