I didn't even know this existed till I was way deep into configuring HA, but thats a good way to learn. Still, this helped me understand things conceptually and troubleshoot a resource problem.

https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/High_Availability_Add-On_Reference/ch-pcsd-HAAR.html

In essence, you got to 

https://nodename:2224

And login with username "hacluster" and the password you authenticated the cluster with.

NOTE: Its always HTTPS, even if you don't have SSL Correctly setup, it will just say the usual warning etc etc.