Hi kevin - I suspect that one may possibly be on me - remember when I put that together for you, I said I wasn't completely happy with that fuse holder, one of the blade sockets wasn't great (but the only one I had on hand at the time) and to try it and see how it went,
The clue would be what the fuse looked like - was the plastic body physically melted, or did it just blow the fusable link?
If the fuse body was all melted, then it was definitely the socket at fault. (high resistance contact on high current circuit produces heat - same issue as why/how that OEM single connector on the Negative cable fries)
I'll need to put new one together for you for when you get back.
But you didn't carry any spare fuses regardless?
I would say to get you home, first, just try a new fuse (and carry a few spares!)
Or I think you'd be safe enough to cut out the fuse holder splice wires together (no fuse) - I really don't think is circuit fault, just bad connection and consequently overheating