I want to figure out what the 58 is directing me to, not sure how to read it.

I think i figured it out. the box is a Battery Power Supply

The BOTTOM OF THE PAGE directs you to the appropriate power distribution page. (Battery power, Ignition power etc.)

what he said. Look at the bottom of the page you’ll see there is a section that will have that same symbol or it will be included in a range of symbols and it will point to another referenced schematic section where you will find where that wire goes

Look at page 12 on the jagrepair,com ( 97 vehicle)
square is a direct battery connection
circle is ignition switched
hex is switched to ground
pointy coffin thing is where that wire goes on another diagram.

EPLS

Scottatl started this thread with only an excerpt and not the complete wiring diagram page if anyone is unclear.

thanks everyone. I am replacing the amp and speakers, so I have been studying the wire diagrams. first time i have ever looked at the, they are really well done.

AS a general tip with the diagrams . The computer chips usually switch there loads to earth so you will find a continuous or ign switched supply on one side of the load and when you want it "ON" the earth is connected. This is the opposite to traditional vehicle wiring of the era .
Never fit non jag relays as they contain spike suppression or you can bugger the switching transistor in the computer module

I didnt know that. I’ve opened Up some of the relays in my house six STR and I didn’t see any capacitors or mother type of suppression components other than a resistor across the coil. Also the relays that are in my 06 are a Ford brand. Where did you hear that there is space suppression on the relays?

The relays often are drawn with the diode shown crudely and it can look like a resistor. It's sometimes known as a fly-back diode.

The back EMF from a relay can easily take out the driver (transistor in the module).