I bought 2 LED Pod lights and I have a Wiring kit for it but I don't know were to run the wires through.
I was wondering if I could wire them into the old fog light wiring

 

You can, but low beams have to be on for the Fog Light wires to have power via the fog light switch
Fog light switch is a ground, it activates the Fog Light Relay, relay is powered by low beam head light power

Assuming 2000 Ranger, diagram below