Ford Mystique Owner's Manual page 167

Check all battery terminals and remove any excessive
4.
corrosion before you attach the jumper cables.
Turn on the heater fan in both vehicles. Press the DEFROST
5.
button. Turn off all other switches and gauges.
Connecting the jumper cables
Connect one end of the first jumper cable to the positive (+)
1.
terminal of the discharged battery. (You can connect either
jumper cable to the positive (+) terminal, as long as you use
the same cable for both positive terminals.) Most jumper
cables have a red cable and a black cable. The red cable is
generally used for the positive terminals and the black for
the negative ones.
Connect the other end of the first cable to the positive (+)
2.
terminal of the booster battery.
Connect one end of the second cable to the negative ( )
3.
terminal of the booster battery — NOT to the discharged
battery.
Connect the other end of the second cable to a good metallic
4.
surface on the engine or frame of the disabled vehicle.
Do not connect the end of the second cable to the
negative ( ) terminal of the battery to be jumped. A
spark may cause an explosion of the gases that surround
the battery.
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RWARNING