In the section SSL Certificates included in LSLB is the action Upload Certificate. This leads to a form to upload SSL certificates to the load balancer. Can be selected one o more local files.
First, select the secure certificate files in PEM format to upload to the load balancer from your local computer and then press the Upload button. After that process, you’ll have available the new certificate in the certificate list and ready to be used for any LSLB farm.