Errrm - no.
Read the thread again. There are no additional pins on the fog button so nothing to connect the extra wire to, the button sends DATA on the same lines to the BCM which contains an additional module.
You have three options:
- Re-verse engineer a module similar to the SEL BCM that would accept the OEM fog switch data and not conflict with the other modules on the data bus. (but it would probably be easier and cheaper to just buy a SEL BCM and have the dealer enable fogs in IDS).
- Modify the switch as Chaddz3 hinted at so that the fog button on the switch somehow activated a standard electro-mechanical switch.
- Use Chaddz3's solution and don't bother with the factory switch, but install a standard toggle or rocker switch elsewhere.