Cadillac SRX 2004 Owner's Manual page 356

Notice: If you connect a negative cable to the ECM,
ECM mounting bracket or any cables that attach
to the ECM bracket, you may damage the ECM.
Attach the negative cable to a heavy, unpainted
metal engine part, other than the ECM, ECM bracket
or cables attached to the ECM bracket.
Don't connect positive (+) to the negative (−) or you
will get a short that would damage the battery
and maybe other parts, too. And don't connect the
negative (−) cable to negative (−) terminal on
the dead battery because this can cause sparks.
5-48
6. Connect the red positive (+) cable to the positive (+)
terminal of the dead battery. Use a remote
positive (+) terminal if the vehicle has one.