What the front drains look like clogged from being parked near trees that shed.
The front drains are the black grommets just to the left of the battery under the exposed colored wiring. There is a similar one on the other side of the battery.
Note that the battery has been removed and that the rubber grommet on the driver's side drain hole has also been removed (but not intentionally). I have to fish it out from underneath, so be careful, it's easy to push it through to never-never land.
You clean the drains by removing any obvious debris from above and directing compressed air or a strong stream of water through the tube until you can demonstrate that water flows freely.
This is important because the rear drains, if clogged, will allow water into the passenger compartment and flood the area under the seats. The $600+ alarm and lock/unlock controller is located under the drivers seat (US car) and can get shorted. If this happens, unplug the battery and get fans and or a hair dryer to dry the area off, then see if things work again. You may have to remove the seats and clean the controller with isopropal alcohol.
The front drains, if clogged, allow water into the front trunk which can rust the floor pan.