Mazda MX-30 2022 Owner's Manual Leaflet page 459

Location shown in the figure (do not connect to the negative (-) terminal of
the lead-acid battery)
5. Start the booster vehicle's engine and rev the engine.
6. Start the EV system of your vehicle.
7. Disconnect the booster cables in the reverse order of their connection after the
EV system is started.
8. Install the lead-acid battery cover.
9. Have your vehicle inspected by an Authorized Mazda Dealer as soon as possible.
Depleted Lead-acid Battery
If Trouble Arises
7-15