Vauxhall Corsa Owner's Manual page 209

There is a safety catch on the underside of
the bonnet: lift this upwards and open the
bonnet.
Dirt or snow on the bonnet may drop onto
the windscreen when the bonnet is opened
and block the air intake.
Air intake – see page 138.
To hold the bonnet in open position,
disengage the support arranged
diagonally in front of the battery, set it
upright and insert it in the catch above the
bonnet hinge.
To close, hold the bonnet, release the
support and press it into its bracket.
Self-help, vehicle care
Lower the bonnet and allow it to drop into
its catch.
Check that the bonnet is locked in position
by pulling at its front edge. If it is not
engaged, repeat the procedure.
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