[Koha] Question on magazine local images

[Manos PETRIDIS]

I understand that magazines are handled in koha under Serials / Continuing
resources, with a record for the magazine, and one or more items for the
magazine issues.
I also understand that one may upload one or more local images at the
record level.

I wonder if/how may one upload local images at the item level, so that
every item (magazine issue) has the cover image pertaining to the specific
issue.

TIA
Manos Petridis