Harness wire sizes

Does anyone have any idea where to look up what the wire gauges are for the fuse and driver side kick panel harnesses? They seem to be 24 awg, but I don’t want to be wrong in case they are actually 26 awg.

I’m currently trying to install a remote start system, and need to add some T taps to hard to reach places, but most of the wires either don’t have the gauge writen on them, or got rubbed off enough that they are not readable.