Fuse Boxes

I have read in this forum about fuse boxes that are under the passenger seat and under the drivers seat.   In the wiring diagrams I got, there are only two fuse boxes (Engine and the other under the steering wheel).  How many fuse boxes are there?  Where?
 
Thanks for your help!
1994 3.9

i only know of the one under the bonnet and the other under the steering wheel. im sure thats all there is