Signal Booster Antenna/Modem

MikroTik SXT LTE6 kit CAT6 LTE Modem for Remote Areas Within Cellular Network Coverage. I tried everything I could to get this to work. Even went to ATT to get it added to our account. I’m missing the ring and arm. I’m just not a tech genius. J5 create=$19 the “instructions” that came with it is intact, but I had to cut private info out.