Where to find the documentation for FAC, NCB, Sagicor and the other banks' payment gateways?

Based on the presentation topic seen below, most banks are using FAC as their base provider. Where can I find the documentation for the various different payment gateways?

Continuing the discussion from Accepting payments via wooCommerce in Jamaica (Presentation).

We’ve collected a series of PDF documentation thus far, which are shared with the community members. If you’re already a community member, you can visit this link:

Nevertheless, if you want to ensure that you’re using the latest documentation, we recommend that you contact the bank that you’re interested in and let it to send you. If you received an updated version of the documentation, please let us know.