That part number (full description: Cisco FirePOWER 2-Port 10 Gbps SR Fiber Network Module with Bypass) includes the required fiber ports built-in.
This is the case for all of the fiber-based netmods.
You can see details in the hardware installation guide here:
http://www.cisco.com/c/en/us/td/docs/security/firepower/hw/maintenance/firepower-8000/firepower_8k_device/hardware.html#pgfId-1103132