Honda CLARITY Plug-In Hybrid 2020 Owner's Manual page 546

uuJump Startingu
544
5. Connect the other end of the second
jumper cable to the power system
mounting bolt as shown. Do not connect
this jumper cable to any other part of the
vehicle.
6. If your vehicle is connected to another
vehicle, start the assisting vehicle's engine,
and increase its rpm slightly.
7. Attempt to start your vehicle's power
system. If it does not turn on, check that the
jumper cables have good metal-to-metal
contact.