the small fuse on the light switch is for the dash and tail lights only [3amp], the springy thermal breakers on the sides of the switch are the headlight overloads, automatically resetting when they cool down, can cause the headlights to go off/on repeatedly if a problem develops, but keep you from totally losing lights .... the only other protection was a fuse panel
like this that was only installed when some electrical accessory was ordered, particularly a radio or extra lights .... the fuse block is shown in dotted lines on the wiring diagram labeled ACC JCT BLOCK
Bill
