Step 5Fit the Top
For the top, put four of the threaded inserts into the top corners of the box and drill through holes that line up on the top. The top should over hang about an inch past the back. The top should also be the same size as the solar panel. Mark the mounting holes from the soler panel on the top and install the other four threded insterts on those spots. You should now be able to screw the top onto the box, and the solar panel onto the top. I used 1" 10-32 square drive machine bolts for all of these. You can optionally add a 1/8 pice of plexy glass with the same mounting holes as the solar panel on top of the solar panel to protect it.