+Ve Battery Clamp - Loose Wires

[soundguy 13]

I've managed to dislodge the two main positive thick cables from the +ve battery clamp (the one that goes to the shunt box as well as the starter/alt cable). Well, when I say managed, it didn't take much effort when I checked to see how secure they were.

Anything I can do to get the cables back into the terminal in a secure way and keep them there? Was thinking, maybe drill the hole out a bit that the cables insert into, fill it with small sections of solder, heat the clamp up with a blowtorch and hopefully solder the copper wires inside?