NH fuses are available with a red indicator dot that pops off when they melt. Yours do not have it, so you can tell they triggered when the boat is dark or the windlass not working
![Laugh :))](https://bavariayacht.org/forum/Smileys/default/laugh.gif)
It should be easy enough to follow the cables to see which does what - on ours the 100A is for the windlass, 125A for house bank. Get a white marker pen or some labels and start marking the cables - it'll be helpful later!