Hi, You should be able to discover it with management software without the console cable and can configure the keys from there. The deployment guide may help. [URL]     Let us know if you have any additional questions.
I don't have a serial cable for Dell EMC CT-SCv2020, I am trying to SSH into it using the management IP but getting "Connection refused".  In another discussion, it was mentioned  Before trying to utilize SSH, you must create your RSA/DSA key pairs (private and public keys used for asymmetric encryption/decryption). Do do so, use the following commands: (config)# crypto key generate rsa (config)# crypto key generate dsa   Can this be done from a web console or another way if we don't have the serial cable?   
SSH to Dell EMC CT-SCv2020