Register SPN for Clustered Instance

Experts,

I need some help to register SPN for SQL 2012 cluster instance on WIndows 2012 OS. I am confused with so many names for cluster n instances :(

We have two node say SQLNode1 and SQLnode 2 and then we have cluster name SQLNODECLU.

So on this cluster we have 3 instances:

AD object for these instances (Client Access Name): SQL CL1, SQLCL2, SQLCL3

And when i launch cluster manager i see 3 other names for these instances like SQL Server (SQLCLUSTERIns1) and so on for other two.

SO what names should we use while registering SPN usin Setspn command??

Thanks!