Leaking roof of a 87 300 Wagon

[Aquaticedge]

I'm having an issue I've not had before, the Sunroof's front right corner was leaking when it was raining today... It's never done this before, Where are the drains, I would like to check them. Also what else can it be? this is the first time I've ever noticed leaking like this, it also appears as if I'm missing some sort of Gasket around the outer lip of the roof but I dont have pictures to See if I am or not... currently my car is covered with a tarp which will go over real well with the HOA monday....