What gauge wire goes to the Coolant Temp Sensor
 

I'm installing the M-Tuned Coolant Reroute, and the instructions nor other writups I've found say what gauge wire to use to extend the harness.

Thanks,
Marcello

It is a low current wire so the gauge is less important than the insulation environmental resistance.

Ok, I'll make sure to use heat shrink tubing, and solder the connections