I just used the male crimp connectors similar to this one that I just picked up at a local parts store
https://www.amazon.com/Baomain-Insu...ocphy=9028099&hvtargid=pla-348514174067&psc=1
Just crimped it to the wiring of the LEDs and plugged it straight into the factory fog light harness and it powers right on when I flip the switch. Otherwise, you’d have to wire it into a separate switch if you can get it to work. But I liked keeping my factory.
Also, I’m positive you did this, but make sure the wiring is correct. The red wire off the fog light is the positive that goes into the white and black wire of the factory harness, and the solid black from the fog light goes into the solid green wire on the factory harness.