Charging the battery on a 2002 Cadillac Seville SLS

I know how to jump start my car and I also
know where the battery is located under the
back passenger seat, but I'm trying to find
out the best way to charge a dead battery in
my caddy. By the jump access under the
hood or directly to the battery itself. My
father says under the hood but my opinion is
to go directly to the battery. This is just until
we get a new battery, btw ;) Thanks!