Ok, my alternator hasent been working for a while, and i finaly got around to fix it..this is the first one im doing on a 87 300 turbo Disel, so i dont know how to change it...

First thing is first how do i loosen the belts..i know there are 2 13mm screws, jst dont know the location of the ...

Thats my biggest issure at the moment so if anyone could give me a step my step on how to do this, or just get me started ill figure it out it would be greatly appreciated...