not sure what you're asking.
are you trying to install a factory fog light housing into a car that didn't have them before?
if so, then make your own harness, because you need to use your own switch anyway.
you'll probably want to buy two H11 sockets with pigtails and a couple spools of 18 gauge wire and a relay and a fuse.
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Q: What's the difference between a bolt and a screw?
A: First, you screw. Then, you bolt.