I have a ZX14 2012 with a Power Commander Pod 300 Installed. I'm trying to setup the Speed selection and I'm having trouble finding the speed wire going to the ECU can someone help me out.

Down at the countershaft cover, there are two connectors. One is for the gear position sensor, the other is the speed sensor. How to determine which is witch>>> unplug one connector and look at the dash with key on. Is the shift window showing N and now step on the shifter and see if it reads 1st gear. If it does, you now have the speed sensor disconnected.

With an ohm meter set to the lowest voltage on the meter, keep key on and probe the one wire at the harness side. Who is hot and who is not? Whoever is hot, this is the wire you need to connect to the pc.

There is no "Speed Wire"

Gen2 >= 2012 doesn't use a sensor off the CS sprocket.

Speedo moved to the CANBUS system and uees the speed rings on the wheels.

I've never installed a PC Pod 300 but from what I
understand is that it plugs into the CANBUS system of the
bike and will automatically read the speed off the CANBUS system.

You should call DJ and ask them.