Lexus 2013 IS250 Owner's Manual page 543

528
8-2. Steps to take in an emergency
3
Connect the jumper cables according to the following procedure:
Left-hand drive vehicles

Right-hand drive vehicles

1
Connect a positive jumper cable clamp to the positive (+) battery
terminal on your vehicle.
2
Connect the clamp on the other end of the positive cable to the posi-
tive (+) battery terminal on the second vehicle.
3
Connect a negative cable clamp to the negative (-) battery terminal
on the second vehicle.
4
Connect the clamp at the other end of the negative cable to a solid,
stationary, unpainted metallic point away from the battery and any
moving parts, as shown in the illustration.
IS250_EE(OM53B11E)