Pest chewed through wires, need to identify part/wires needed

I don't see any sign that anything bad happened to the circuit-breaker sensor itself, only to the two wires connecting to it.

If you're just going to use splicing materials you already have on hand to repair those wires, there may be no need to look up any parts.

You could buy Toyota's repair terminals for the yellow connector, and if you wanted to do that, you could find the part numbers in the online wiring diagram, as this post describes.

But I don't see any advantage to doing that here. The repair terminals come with short lengths of wire attached, which you still have to splice to your original wires; the usual lengths would put the splices just about where you could just splice what you've got already. I don't see any sign of damage nearer to the terminals or connector.

 

It looks like that piece of wire loom was also chewed at its base. If the wire visible there is actually damaged (hard to tell from the picture) the OP may need to unwrap the wire harness a little below that point to get an inch or so of clean wire to splice to. There is plenty of clean wire on the plug side already. A new piece of wire loom might also be a good idea, that one has seen better days.

 

Get one from a junkyard.

Or did you mean the cable to the hatch broke? That is much more common than the latch itself breaking. The part number for that cable is 53630-47030, MSRP is $55 but one local Toyota dealer is selling the OEM part for $41.

Hood Lock Control Cable Assembly #53630-47030 | Autoparts.toyota.com

The Dorman one is $24 at RockAuto. Given the abysmal quality of most things Dorman and the high PITA factor of a stuck hood, I would spend the extra $17 for the real deal.