Need Help to Update Note 4 N910 AT&T

i have Galaxy note 4 N910 AT&T
installed firmware version :- 4.4.4 KitKat
Baseband :- N910AUCU1ANIE
build Number :- KTU84P.N910AUCU1ANIE
i want to upgrade Lolipop version 5.0
there are 2 files on suppport area for Lolipop 5.0
which one should i installed for my phone .
phone working fine just need upgrade firmware .
Let me know Saftey precautions before flashing .