My guess is you should be checking that the hold linings are intact, no holes, gaps or areas that have been caved in.
Especially with regards to holds which use container loading, as the containers easily get damaged and rip the hell out of the linings or hold panels.
It will also depend on what your pre-flight/walk round check contains or if you are allowed to sign for a daily check (most are not allowed).
If they list checking the holds then you don't have a leg to stand on.