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I didn't see any car information but this works on most applications, If you open the sunroof and at each front corner there is the drain hole these typically lead through the roof and down through each A pillar (metal posts on each side of the windshield) and down into the wheel well, Normally light to moderate compressed air into each drain hole at the corner of the sunroof clears them.
The pic below is from a cavalier sunroof typical of most sunroofs
After I posted I seen your car info.
Here is the procedure for cleaning the drains on your car from the service manual you have 4 drains one at each corner.
Sunroof Drain Channel Inspection and Cleaning
A drain trough encircles the sliding panel and leads to the drain hoses. The drain hoses are at each corner of the housing. The 2 front drain hoses route down the windshield pillars. The 2 rear drain hoses route down the rear sail and the quarter panels.
If you encounter a wet headliner or other water leaks, inspect the following areas for the source of the leak:
Verify that the drainage system is not plugged or restricted.
If water drips from the headliner above the door or the quarter window, lower the headliner as required in order to inspect for a proper drain tube connection. If necessary, re-tighten the drain tube clamps onto the housing at the drain spout.