If when you downloaded the update rpm files and saved them by checking
keep downloaded packages on every repositorie in
configure software repositories.
Then move the zypp folder to another partition say to home folder the folder
you are looking for is /var/cache/zypp.
once you have reinstalled and not wiped the home folder
Then going back to confige software repositories click add click
local directory and then browse to directory click next all done and when
you go to software management the files will be shown. or you could do a
zypper dup. and it will do the rest.