I recently discovered several litres of water pooled up in the spare wheel well of my '99 outback. The blue line represents the approximate water level (yes, thats alot of water!)
Is anyone aware of common water entry points in their subaru's? I'm yet to sit in the car while someone hoses down the outside, but thought having a few key places to look might be handy.

Currently, I suspect that the rear tail lights may have been off/replaced at some point, and wonder if the water channeled down beside the tailgate rubber is going behind the lights and into the car, as indicated with the yellow arrows.
If anyone could confirm this as the likely culprit, or give a few pointers for removing the lights (without breaking them) it would be greatly appreciated!
Cheers,
RB