Need help! Cables are not threading from Antenna to Modem

https://imgur.com/a/orQ4HRt Need assistance with coaxial cables not connecting. I tried my best but I don't know anything about coaxial connections.

Company needs a Panorama Antenna that is outside connected to this Modem(1st image)
both the Antenna and the Modem look to have, what I understand, an SMS-Male connector.

Seeing as this was the case, I purchased some SMS-Female connectors. To my surprise, it didn't fit because it wouldn't thread. The size looks correct, but the thread is wrong? What kind of adapter should we purchase?

Thank you for all your help!