Module id/location number for Prius c?

There's a post over here that shows how you can double-check using the color codes of the voltage-sensing wires (the skinny ones that connect at every second module down the length of the pack).

There's been a rule often given that "#1 is where the cable goes on the ⊖ end of the module", but the gen 1 Prius was an exception to that rule. Maybe the rule is right for all the generations after gen 1, but usually as soon as I see one exception to a "rule" I become cautious about it, and just say "eh, I'll double-check for my car".

The post I linked doesn't include the diagram with color codes for Prius c, so somebody might have to look that up.

Toyota Service Information and Where To Find It | PriusChat

One case where the color coding might not be enough would be if there's been previous work on the battery and that voltage-sensing wire harness (or "no. 2 frame wire") was replaced with an aftermarket one; those might not match the factory color codes.

In a car where the "connected at ⊖ end is #1" rule holds—remember it doesn't hold for all generations, but in a car where it does—the location that matters is where the cable connects to that module, not wherever the other end of the cable might attach to the relay.