Step 1.
Make sure both nodes have same Junos version- This is a must for cluster to work fine.
Step 2.
Delete complete config from both nodes and just keep root password .
Step 3.
Connect ge-0/0/5 and ge-0/0/7 between both nodes
Step 4.
Enable clustering using "set chassis cluster cluster-id X node X" on both nodes and reboot them
Step 5.
Once they boot up I expect them to be in cluser
Step 6.
Now make necessary configurations from primary node.