Back passenger side leak

[srvE30]

I have a leak coming from somewhere that is leading into my back passenger side. I have a cabrio with a snug hardtop.

NOW THIS IS WHERE SHIT GETS TRICKY. I had a leak on my driver side in the back carpet and it was solved by getting it in with the drain holes. Fixed problem. Life was good. Rained, was all good. Past few days though it hasn't rained. As I leaned my passenger seat forward and look down at the carpet AND THE DARK WET SPOT OF DOOM WAS THERE! I don't know how or why, but it was a nice sized puddle, as if it had rained hard pre drain hole days. I guess snow melted and some how it leaked into the car. I honestly don't know. Unless it like went through the fucking door seal. But I am confused. I also get a good bead of water on my driver side window that leaks and drips right into the driver seat aka my leg aka makes me look like I pissed myself. I have leaks from hell.

Help

Please

[AndrewBird]

Have someone sit in the backseat while you spray the outside down with a hose. The leak should be obvious.

[srvE30]

Have someone sit in the backseat while you spray the outside down with a hose. The leak should be obvious.

I got nobody :(

[ELVA164]

Spray the outside with a hose, then open the door and look. Not as 100% accurate, but the path the water takes should still be fresh.