Buick 2013 Regal Owner's Manual page 341

The jump start positive is under a
trim cover in the engine
compartment on the driver side of
the vehicle.
The jump start negative grounding
point for the discharged battery is
the engine block or an engine
mounting bolt. Connect to a spot as
far away from the discharge battery
as possible.
These locations are used instead of
a direct connection to the battery.
1. Check the other vehicle. It must
have a 12-volt battery with a
negative ground system.
2. Position the two vehicles so that
they are not touching.
3. Set the parking brake firmly on
both vehicles involved in the
jump start procedure. Put an
automatic transmission in
P (Park) or a manual
transmission in Neutral before
setting the parking brake.
4. Turn the ignition to LOCK/OFF
and switch off all lights and
accessories in both vehicles,
except the hazard warning
flashers if needed.
An electric fan can start up even
when the engine is not running
and can injure you. Keep hands,
clothing and tools away from any
underhood electric fan.