where do the sunroof drains exit?

i cleaned out the front drains, but when i snake my weapon of choice (a scooter clutch cable) to the rear it doesnt ever seem to catch in a drain. are the drains exiting the sunroof way in the back? i figure if i have the exit point, i can slide a cable up into the sunroof, and then lead another cable back out.

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1979 300TD wagon (non-turbo)
266,000+