Toyota Repair: clogged drains-sunroof, sienna xle, clogged drains

Question
can you tell me where the drain lines exit the van['97 sienna xle]
from the sunroof?the two front drains are clogged.would it be best to try and unclog from the exit end?

Answer
They exit underneath but may be located in the body panels and drip out drain openings, the drain tubes can be cleaned out from the top by opening the sunroof all the way, the drain holes are located on the corners of the drip rail,compressed air may work to clean them out.