When installing the projector in
a high location such as a ceiling or shelf, you can install the
safety wire (not included) to prevent the projector from
falling.
Pass the safety wire
through the security cable attachment point on the
projector.
Attach the other end of
the safety wire to a structure that is strong enough to bear the
projector's weight. If the wire is too long, loop the wire around
so that there is as little slack as possible.