To configure a client to perform the registration against an SMT server use the YaST registration module (yast2 inst_suse_register).
Click Advanced > Local Registration Server and enter the name of the SMT server plus the path to the registration internals (/center/regsvc/), e.g.:
https://smt.example.com/center/regsvc/
After confirmation the certificate is loaded and the user is asked to accept it. Then continue.
WARNING: Staging Groups Registration
If a staging group is used, make sure that settings in /etc/suseRegister.conf are done accordingly. If not already done, modify the register= parameter and append &namespace=namespace. For more information about staging groups, see Staging Repositories.
Alternatively, use the clientSetup4SMT.sh script (see Configuring Clients with the clientSetup4SMT.sh Script in SLE 11).