How to update service pack from saved file, not through "check for updates"

I am off maintenance, but have service packs saved that were downloaded while I was on maintenance.  How do I update the service pack from these saved files?  Going through the Help menu on the SW top panel --> "check for updates" doesn't offer the option to enter in a folder path to where these updates are saved.

Thanks,

Brendan

SolidworksAdministration