Sorry, I thought you were referring to ssh keys. I don''t user the password manager at all. For reference, I create public+private keey pairs (ssh-keygen) and then add then:
1) add the key to to keychain
2) put the public key on the remote host (~<username>/.ssh/authorized_keys)
3) connect the remote host with: ssh -l <username> <host>
Wherever possible I prefer keys over username+password.
Gavin