O.k.. these are not my pics nor does it show the passenger side, but it's the same..
The water flows down the windshield and into the wiper channel... the wiper channels the water into the fender channel ( in the frame of the car) which then channels the water out from the under side of the car.. throughout the years and moisture, the channel will rust/ rot due to water sits there until it's drained..
The following picture shows where to access that leak/ rusted/ cracked channel
Notice, the owner of this maxima had to cut open the access bigger ( when you take off your fender , you will understand)
once the opening is cut bigger ( I cut mine diferently by preserving the bevelled surface to preserve the frame structure) you will be able to see what rusted/ cracked surface I was refering to.
Now in these pics, the owner used a piece of aluminum and tar and silicone to cover/ patch the hole..
I used plastic metal to fill in the hold/ crack and then used a rubber guard spray to coat the whole surface to make sure the water doesn't get onthe plastic metal ( it's like putty , but hardens)
again these are not my pics, but this is what I used to guide me to fix my leak.
anything happens to your maxima while performing/ following this repair is to your own risk.