Buick 1998 Century Owner's Manual page 225

5.
Find the positive (+) and negative
(-)
terminals on
each battery. Your vehicle has a remote positive
(+)
jump starting terminal. The terminal is on the same
side of the engine compartment
as
your battery. To
uncover the remote positive
(+)
terminal, squeeze the
sides of the red plastic cap and pull the cap upward.
You should always use the remote positive
(+)
terminal instead of the positive
(+)
terminal on
your battery.
Using
a
match near
a
battery can cause battery
gas to explode. People have been hurt doing this,
and some have been blinded. Use a flashlight if
you need more light.
Be sure the battery has enough water. You don't
need to add water to the ACDelco Freedom@
battery installed in every new
GM
vehicle. But if
a
battery has filler caps, be sure the right amount
of fluid is there. If it is low, add water to take care
of that first. If you don't, explosive gas could
be present.
Battery fluid contains acid that can burn you.
Don't get it on you. If you accidentally get it in
your eyes or on your skin, flush the place with
water and get medical help immediately.