The original 2CV fuse box uses glass fuses in a plastic case glued to the firewall at the back of the engine. As long as nothing goes wrong with it this works as well as it needs to but it’s not a solution you’d choose to keep if you were changing things.
As I’ve got a bare wiring loom for my Burton project, and I’ve done the hard work of identifying which connector is which, it was a relatively simple – if time consuming – task to replace each of the old glass fuse terminals with a female blade connector and cover them with an appropriately coloured piece of heat shrink. These then fit onto the male blade terminals of a generic after market fuse box.
Whilst there are only five fuses in a standard 2CV fuse box I’ve gone for eight as that gives me room to add fuses for some of the additional circuits I’m going to be adding – notably an electric fuel pump.