Custom Capabilities Syntax

I am working on migrating an old s2member site to a new site with s2member and I updated 2800 users with some custom capabilities that were present in the old site. I have been having trouble finding straightforward documentation about how to create these, but reading between the lines, it looks like I am supposed to prepend them with “access_s2member_ccap_” so for financials custom cap it would be “access_s2member_ccap_financials”. Is this correct?

Do they need to be prepended? I also am unable to see them in the users table, but inside each user page, I can see them at the bottom under additional capabilities. Am I doing this correctly?