Cadillac 1996 DeVille Owner's Manual page 230

Don't let the other end of the negative
(-)
cable touch
anything until the next step. The other end of the
negative
(-)
cable doesn't go to the dead battery. It
goes to a heavy unpainted metal part on the engine of
the vehicle with the dead battery.
IT;
10. Attach the cable at least
18 inches (45 cm) away
from the dead battery,
but not near engine parts
that move. The electrical
connection is just as
good there, but the
chance of sparks getting
back to the battery is
much less.
11. Now start the vehicle with the good battery and run
the engine for awhile.
12. Try to start the vehicle with the dead battery. If it
won't start after a few tries, it probably needs
service.
13. Remove the cables in reverse order to prevent
electrical shorting. Take care that they don't touch
each other or any other metal.
A. Heavy Metal Engine
P a r t
B. Good Battery
C . Dead Battery