keystore file [ Is upload required for every logical system? ]

Hi,

In CMC --->Authentication--->SAP

We have three system under logical system name under tab Entilement systems
      SPECLNT720 [ ERP DEV ]
      SPBCLNT800 [ BW QAS ]
      SPECLNT920 [ ERP QAS ]

Now

     1. I selected first logical systems SPECLNT720    from dropdown and updated username , password    ,Application server details etc.

     2. Now I clicked on Role import and it was    succsessful.NO error.

     3.SNC settings : NO Change

     4.Options :
            Enable SAP Authentication: Checked
            General Options :
                          Default system :I can see three logical system in dropdown [ Which one should I select?]
                          Connection Options : No Change
                           Users : Concurrent users
                           Attribute Binding Options : No change
                           SAP SSO Service : Hostname
                           A key store file has been uploaded.
                                         Key Store Password : Entered password
                                         Private Key Password : Entered password
                                         Private Key Alias    : Alias name entered.

I Updated these details only for first logical system SPECLNT720. But I can see these details appearing for other systems [ SPBCLNT800 and SPECLNT920 ] too.
   So Do I have to upload same keystore file for every logical system [ SPBCLNT800 and SPECLNT920 ] and provide Key Store Password,

    Private  Key Password and  Private Key Alias for every logical system?

Regards,
Vinay