I'm building an 07 and just finished repairing that harness. Gotta say yours is way worse than mine was. Yes the 4 heavy gauge wires are the cooling fans. The six multi colored are the WS washer pump , washer fluid level sensor and the horns. And yes, that gray conector plugs into the park/fog lamp harness.

If you have a pick a part or friendly auto wrecker near, a trip with a set of wire cutters may be in order. Looks like you are missing a lot of plug connectors.