Look for the box with the word key or legend
A map key is found on a map. It tells what certain symbols on the map mean. For example, the "star" on most maps means state/country capitals. It is in a small box.
key
A map key will have the meaning of the different symbols that are found on a map. So if there are tree symbols on the map the key may explain that these symbols mean there is a park in those locations.
I'm not sure about the location for your 300SD, but I have a 1979 450 SLC and the fuse box is located underneath the dash on the passenger's side -- to the right of where the passenger would place his feet. The fuse box diagram should be glued to the back of the door that opens to the fuse box.
a key
Map symbols are typically shown in a rectangular or square box with a thin black outline to distinguish them from the rest of the map's features.
The map legend or key explains what the symbols on a map represent. It provides information about the features, colors, and symbols used on the map, helping users understand the map's content and navigate effectively.
Look for the box with the word key or legend
The symbols on a map are defined in a key. The key defines each symbol so one can properly read a map.
The small shape, usually a box, that explains what different symbols on the rest of the map mean.
In the related links box below, I posted the information.
Graphics can't be shown on Answer.com. Two symbols can be used: one is a zigzag and the other is an narrow oblong box. Search the internet for drawings of schematic symbols.
For the source and more detailed information concerning this subject, click on the related links section indicated below this answer box.
A key legend is a guide that explains the symbols or colors used in a map, chart, or diagram. It helps users interpret the information presented by providing a key to understanding the meaning of each symbol or color.
The map key or legend contains information on what the map symbols represent. It provides a guide to help users understand the significance of different symbols, colors, and patterns used on the map.
A map key is found on a map. It tells what certain symbols on the map mean. For example, the "star" on most maps means state/country capitals. It is in a small box.