Yes the solar is wired directly to the battery through the bottom red inline 30A fuse.
The top red fuse runs your level up control panel and tank heaters ( ask me how I know
)
I'm not sure what the black inline fuse goes to. I'll have to work on that.
Here are a couple of videos
Jaboni/Montana solar prep
https://youtu.be/mhE9pSum_nA
Jaboni/Montana solar install
https://youtu.be/gn3BIWaSb4c
Pull the covers off the inline fuses and make sure they are pushed down in there all the way. They tend to creep out.