Mazda MX-5 2024 Owner's Manual page 338

What to Do in Case of Emergency
Engine Does Not Start
Refer to Removing the hole cover in Inspecting Lead-acid battery on page 9-25.
3. Remove the lead-acid battery cover.
4. Turn off the booster vehicle's engine and connect the jumper cables in the
following order.
Make sure that the jumper cables are securely connected so that they do not
disconnect due to the vibrations.
1st lead
Positive (+) terminal on the depleted lead-acid battery
Positive (+) terminal on booster vehicle's battery
2nd lead
Negative (-) terminal on booster vehicle's battery
Location shown in the figure (do not connect to the negative (-) terminal of
the depleted lead-acid battery)
8-14
MX-5_8ME4-EA-23L_Edition1_new 2023-8-31 16:47:34