The following command uploads a certificate called cert.pem to the LoadMaster:

curl -X POST --data-binary "@cert.pem" -k "https://bal:1fourall@20.200.25.100/access/addcert?cert=acert"

Response: 

<?xml version="1.0" encoding="ISO-8859-1"?>
<Response stat="200" code="ok">
<Success>Certificate Successfully Installed</Success>
</Response>