SSH Between SRX Nodes

Problem:    

How to SSH from Node0 to Node 1 within a Juniper SRX cluster.
How to connect from the primary node to the secondary node.

Solution:  

1. SRX 300 Series:
   
   {primary:node0}
    smj@SRX> request routing-engine login node 1
   
   
2. SRX 1500 Series:
   
   smj@SRX% rlogin -T node1

That's It!