Quite likely they are owner installed, so your best bet is to either contact the previous owner, or pulling the emblem off to look at the wires. Hopefully they are some color other than black, so you can then follow them to where ever they go. To start, they probably run under the headliner, to the windshield post, and down to some spot under the dash. From there it's anyone's guess. My new van had several mystery switches, and using a similar method I finally figured out what they all did, and then labeled them all.
Agile Ride improvement package