Chevrolet 1999 Monte Carlo Owner's Manual page 189

It goes to a heavy, unpainted, metal part on the engine of
the vehicle with the dead battery.
8. Don't let the other end
touch metal. Connect it
to the positive (+)
terminal of the good
battery. Use a remote
positive (+) terminal if
the vehicle has one.
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.
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.
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