With credit to Mikeki7 and Phi1098 elsewhere on the internet:
There have been multiple reports of water collecting in the tops of the front shock towers, under the plastic covers behind the frunk. Photo thanks to Mikeki7.

Phil1098 has identified weep holes below the passenger side of the windshield as a possible source of water on that side. Per him:
There have been multiple reports of water collecting in the tops of the front shock towers, under the plastic covers behind the frunk. Photo thanks to Mikeki7.
Phil1098 has identified weep holes below the passenger side of the windshield as a possible source of water on that side. Per him:
So it has been thought that the battery cover area where the interior air intake is was where water was coming from that fills the upper strut tower after washing, it's not. I took mine off and looked last night and the screen opening isn't above the strut tower, ***? So then I look at where the strut tower is and notice the drain holes at the lowest part of the windshield cowl panel. I took my light and held it over them and it illuminated the upper strut tower as shown in the pics. If they would have had the holes towards the driver about one inch or put a little funnel and drain line under the holes it wouldn't happen. I'm going to see about coming up with a small funnel and line to resolve this. If you have washed your car, you too have a bunch of water in the strut tower.

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Light laying in windshield cowl illuminating the strut tower.

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Light on top of strut tower shining up.
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Light laying in windshield cowl illuminating the strut tower.
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Light on top of strut tower shining up.
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