1. Look for the "+" symbol. The positive battery terminal is usually marked with a "+" symbol. This symbol is often found on the battery itself, as well as on the battery cables.
2. Check the color of the battery cables. The positive battery cable is usually red, while the negative battery cable is usually black. However, some vehicles may have different color codes for their battery cables. If you're not sure which color is which, refer to your vehicle's owner's manual.
3. Test the battery terminals with a multimeter. A multimeter can be used to test the voltage of the battery terminals. The positive battery terminal will have a higher voltage than the negative battery terminal.
Here are some additional tips for identifying the positive battery terminal on a 2002 Miata:
- The positive battery terminal is usually located on the driver's side of the vehicle.
- The positive battery terminal is usually larger than the negative battery terminal.
- The positive battery terminal is usually connected to the starter motor.
If you're still not sure which battery terminal is the positive side, you can always consult your vehicle's owner's manual.