OpenVPN how to add route to AWS Load balancer

I have a load balancer in AWS, I want to restrict access in its security group to be accesible only from my OpenVPN server. Now, I would like to use push "route a.b.c.d 255.255.255.255" in server.conf, in order to advertise the loadbalancer address to VPN clients as being accessible through the VPN The problem here is that AWS uses CNAMEs for pointing to load balancers kind of MyDomainELB-918273645.us-east-1.elb.amazonaws.com instead of IPs How could I advertise my clients to reach AWS load balancers through VPN ?