Recevier FTPS- Hierarchy & How Load trusted keys in keystore

Hi Experts,

Need your help for faster execution . We are stuck at one step :-

http://scn.sap.com/message/7146900#7146900

http://scn.sap.com/people/rajasekhar.reddy14/blog/2010/04/13/how-to-configure-ftps-in-file-adapter

We have IDOC to receiver FTPS scenario in PI 7.1
Port --11005

1. We have created & Configured PI Private key

NWA – Configutation Management ---- Key Store – Service SSL

2. As per this PI Private Key , we “Generate CSR Request “ and sent to our client to get trusted“ Client Public/Trusted Keys”.
We got below trusted keys from client.

trusted -Leaf
trusted -Root-CA
trusted -Server-CA

3. What will be the hierarchy or priority to load above keys.
How to -- Load trusted keys in keystore

Is this the option -- >NWA – Configutation Management ---- Key Store – Service SSL --- Import CSR Responses.

Kindly suggest !