Water enters gap around rear tail lights

Removed the plastic cover by rear taillights and noticed the water flows through the highlighted gaps onto the trunk/boot floor. Should these gaps lead somewhere or be connected to anything?

 

Thanks for that. Yes, rainy England! Beneath the plastic removable cover was actually clear but the car is parked on a slight tilt so when it rains the water flows mostly down the rear right side of the hatchback/trunk door and much if it pours through those gaps. Have you experienced water from the trunk reaching the rear seats or rear footwell areas?

 

Thanks - did you ever experience water from the trunk reaching the rear seats or footwell areas?

 

That is excellent. Thanks for the highlighted photo and other information. There is likely more than one leak in my car - one similar to the trunk leak you describe and possibly another which flows down the side edge of the rear seat (slightly soaking the edge of the cushion) and down somehow into the footwell. Will keep searching for the source but will resolve the trunk leak first in case it is connected. There is a good amount of water entering the lower (red highlighted) gap straight into the trunk. Might seal this up but it must serve a purpose? Thanks again.