Here are some pictures of the wiring. As previously mentioned, I ran 4 wires from the roof. Two fans are hooked up to each "pair" of wires. You can see the wire loom going from right to left.
I'm drilling a whole to a open space below my refrigerator to fish the wires inside.
Here are the 4 wires from the roof to under the refrigerator. I ran 4 additional wires not in the picture back to the exterior compartment to grab the power source and ground (1 power and 1 ground for each switch)
Here's a picture of the exterior compartment with all the wires bundled up and taped down. I will probably get rid of the wire nuts in the future and hook up terminals instead.
Here are the two switches all wired up. I went with a red and a green one for a christmas theme. Actually Radio Shack only had 1 of each and I didn't like any of the other switches they had. You will see 8 wires now. The 4 on the right are the ones from the roof, and the 4 on the left are the 2 positive and 2 negative power sources that are tapped from the exterior compartment.
Here is the finished install. I counted it to the bottom right corner of the refrigerator. I could have mounted the switches inside the compartment below the refrigerator, but I didn't want to forget about them, so I elected to mount them on the outside.
Here is the exterior with a paper towel being sucked in. This is only with 1 switch on.