First, I tried uploading the certificate using the AWS command line tools like so:
iam-servercertupload -b MyCert.crt -k MyCert.key -s TESTKEY -c CA_Bundle.pem
CA_Bundle.pem is the chain key provided by Certificate Issuer.
Find the name of uploaded certify:
add new listener to existed LoadBalancer:
elb-create-lb-listeners my-load-balancer --listener "protocol=https, lb-port=443, instance-port=8080, cert-id=$CERT" --region eu-west-1
Make sure your instances accept HTTP connections on port 8080 (add port to apache conf).