Tacoma AC blower housing question

2015 Tacoma

Just noticed yesterday that water is dripping on the passenger mat when the AC is on and the truck is not moving. Dry day, but humid.

I found the source of the water, and it is circled in the photo here (photo is of another truck pulled from the internet). However...the difference is where I have circled...on my truck is open. There is no bottom on this piece. Is that right? Should it be plugged?

It is going in for service on Thursday, but was just curious.

Thanks!

 

i bet your drain tube is plugged
blow some compressed air up in the tube and water will rush out