It is not possible to access the Plugin Manager without Administer permission.

I want to create a user that must be able to update plugins. However, this user should not be able to:

• Manage Jenkins
• Upload Plugins (in the Advanced Tab)
• Configure the Update Center (in the Advanced Tab)

Permissions to revoke in order to achieve that are:

• Administer to restrict access to Manager Jenkins
• ConfigureUpdateCenter and UploadPlugin to restrict access to the Advanced Tab

However we cannot make it work because a user without Administer permission cannot access to the Plugin Manager.