Saab Repair: 1998 Saab 900S 2.0 turbo Coupe, 1998 saab 900s, rubber grommets

Question
Just purchased the car from a private party.  Trunk deck was wet and musty.  Dried the mat and two days later (in the rain) it was totally soaked again.  Gaskets seem good and intact.  Cabin area doesn't seem to be affected by the leakage. Is there some area I should focus on to try to prevent further leaks into the rear area?   Thanks in advance for any help you can give.

Tom

Answer
Inside the car, below the taillights, are 2 rubber grommets with holes for hoses to plug in.( 1 on each side of the car)If the car has a sunroof there will be a hose from the rear corner of the sunroof to one of these grommets. On the driver side there is another hose running from the bottom of the power antenna. These are designed to direct the water to the outside of the vehicle. there could 2 different problems. 1 is that the hoses has become disconnected from the grommet, the other is that the grommet has become plugged from the outside and will not allow the water to drain properly, Simply reconnect the hose or clean the grommet as needed.Sometimes the rubber gaskets around the taillights can leak but these hoses/grommets are much more likely culprits.