NEED HELP with an electrical transmission issue. 2001 Thomas flat nose.

[Moiratuohy]

Hi Fellow skoolie friends. I have a 2001 Thomas MVP Saftliner. Flat nose School Bus. The bus has an electrical issue. There electrical transmission is not lighting up or working. We have tried to find a faulty connection or where the wiring goes to help it out..... but no luck.
Any thoughts, or ideas? My helpers and I would appreciate is. Here are some pictures for your viewing.
Pictures include the fuse box. The other is the side wiring panel. And a picture of the type of bus.