Don't know about a 2005 since mine is a 1998. On mine there is nothing over that far that concerns the radiator. The windshield washer bottle is above that area.

The coolant resevoir bottle is on behind that area. I wouldn't think the design would change to drasticily over the years since the body style has pretty much stayed the same. Have you been adding coolant to the car since you have been noticeing the small leak area?