I have a 93 Del Sol SI and I believe water is leaking into the rear window compartment. I can hear water sloshing around when I turn. It eventually dries up, but now that it's summer and it's raining a lot, it's had water in it for quite some time. I'm worried about it rusting. Can anybody point me to a place where I can drill a hole or open a drain cap to get this water out?

-Joel