Toyota Highlander Hybrid 2017 Owner's Manual page 518

518
7-3. Do-it-yourself maintenance
Remove the clamp cover.
3
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Exterior
Make sure that the 12-volt battery terminals are not corroded and
that there are no loose connections, cracks, or loose clamps.
Terminals
1
Hold-down clamp
2
HIGHLANDER_HV_U (OM48F12U)