Ideal way to deploy SSL to blades/chassis
The set of racadm commands that you need is sslkeyupload and sslcertupload. On a Dell M1000e these should be run using the idracadm tool (the ssh interface does not allow you to upload files). On other Dell servers you would have to use the tool corresponding to the (iD)RAC version, i.e. racadm4, racadm5, idracadm, or idracadm7.
Something like idracadm sslkeyupload -t 1 -f path/to/key.pem and idracadm sslcertupload -t 1 -f path/to/wildcard-cert.pem should do the trick for you.
The iDRAC documentation has more information about these commands.