The fuse diagram should be in your owners manual, and also on the fuse box cover. If you don't have the manual, and there is no diagram on the fuse box cover, go to your local Nissan dealer and ask them to give you a diagram.
See the Chilton's manual for lies. Well, not lies, but only the passenger side, which is easy. Now if someone has something on the driver side....
The bolts have a number on it, what is the number? There is a general torque spec in the shop manual that will say what the torque is based on that number
Pages 8-26 & 8-27 of this pdf file has the location of the fuse panel. The radio fuse is listed in the cover once you've followed the directions for opening the panel. http://www.nissanextendedwarranty.com/owners-manual/nissan/2004-Nissan-Altima.pdf The pdf is the OWNERS MANUAL for the 2004 Nissan Altima
in the left side leg clutch pedal there is a square cover. rigth there is it.
The fuse box diagram can be found in the owners manual of this car. It can also be found on the fuse box cover in this car.
The diagram for the fuse box panel for this car is found in the owners manual. It is also found on the cover of the fuse box.
Go back about three pages and look for the question "Is there somewhere other than the kick-panel you can find which fuses etc. He gives you the order.
Check in your owners manual
In your owners manual is one source. The cover for the fuse center will also have a diagram. Click the link to access an online version of your owners manual.
check you labrary for a repair manual
When you remove the cover it should be on the underside of the cover. Also, if you have the owners manual it is in there.