How to install plugins in old version of jenkins offline?

Question

Jenkins

Actually there is some old (not current) version of jenkins on a machine without an Internet. I want to put some plugin with dependencies under it. From the site I can only download the latest versions of plugins (which require the latest version of Jenkins)
Google says that I can manually download plugins of any version from FTP, but there you can’t find out which version of Jenkins the downloaded version of the plugin requires and you can’t find out the dependency versions until I download and I won't look inside.

Are there any solutions other than "put the old jenkins on the machine with the Internet and download the plugins" and manually sort through all the versions of the plugins on FTP?