Can you explain "nothing comes up"?
Correct me if I'm wrong, but I think you might be under the (mistaken) assumption that these will be recognized and presented in the TrueNAS UI as if they were network cards. They won't.
What you have are Fibre Channel HBAs, which don't run on the IP network (yes I know FCIP and IPFC both exist, don't @ me ;) ) and will require additional off-the-books tuning to make work, regardless if you choose TrueNAS CORE or SCALE. It's a lot closer to treating your TrueNAS machine as a disk shelf, with the FC HBA in your client system being the "storage controller" there.
It's only usable for block storage, so if you're hoping to be able to access existing shares and files you'll want to look elsewhere. However, it will give you a great way to carve out a chunk of your TrueNAS machine as a ZVOL and have it appear as a local drive on that one Windows machine.
I'd suggest you look at the 10GbE networking primer to accomplish what you're looking for here, as it's probably more in line with what you're hoping to achieve.
This is a discussion of high speed networking for newcomers, with specific emphasis on practical small- to medium-scale deployments for home labs or small office users. It originated with a forum thread located here that has many pages of...
www.truenas.com
Of course, I might have been wrong in that assumption, invalidating my entire post. It is late here, after all. ;)