Buick 1995 Century Owner's Manual page 172

10. Now start the vehicle with the good battery and run
11. Try to start the vehicle with the dead battery. If it
won't start after a few tries,
it
probably needs
service.
the engine for a while.
12. Remove the cables in reverse order to prevent
electrical shorting. Tdke care that they don't touch
each other or any other metal.
Remove cables in this order:
A. Heavy Metal Engine Part
B. Good Battery
C . Dead Battery
5-6