On my now former 2001 I discovered that the fuse box covers are different for the different options, unlike US cars that show all options and then add "if equipped".
To find what fuse does what, you can download the free FSMs at the link below.
@Satito also recommends that you set a PDF reader, not a web browser, as the default app to view them. Then, when you click a link to one of the other PDFs, it'll open it, whereas the browser will not.
Nissan Service Manuals - NICOclub
To find a cover, your best bet is a junkyard, but be mindful of what I learned and try to find one with the same options as yours.
If you'd like a picture, share as much detail about yours as possible, including the options. Be as specific as possible so anyone here who might read this and have the same options might be in a position to snap some pics for you.
In the interim, snap a couple pics of your fuse box, as that might help folks here to help you.