I have a 2008 SRX and there is water on the floor behind the passenger seat. I rain a hose with someone inside looking for gasket leaks and did see any. I am now turning my attention to the sunroof drains being blocked. My question is how many are there and where is the location of these drains when i open the roof? I see two in the front that are easy to get to but are there two in the rear that you cannot get to?