Removing the panel above the windshield?
 

I have a 1930 closed cab pickup with some rotten wood in a 6" area on the driver's side near the door corner where the top and trim strip nail down. To get to it I need to remove the panel above the windshield and under the visor. I see the nails but does the windshield need to be slid out first, and is there anything else holding the panel? Thanks for the help!