Oldsmobile 1997 Aurora Owner's Manual page 223

9. Now connect the black
negative (-) cable to
the good battery's
negative
(-)
terminal.
Don't let the other end 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.
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 a while.
12. Try to start the vehicle with the dead battery. If it
won't start after a few tries, it probably needs service.
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