The '70s called, they want their fan belt setup back

Before changing a serpentine belt, make sure the diagram under the hood is still intact. My son & I changed the belt on his Buick & only realize the belt diagram was gone after removing the old one. It was so tight in there & very difficult to see & there were about 20 different ways the new one would almost fit. Took about an hour & a half to finally get it on right.