[Plugin: Cursus Webshop Plugin] Please help I dont understand how to use this plugin

When i go to the Cursuswebshop Options plugins settings in WP
i see this:

Moodle Site Key
Pay.nl Username
Pay.nl Password
Pay.nl Company ID
Pay.nl Program ID
Pay.nl Website ID
Pay.nl Website Location ID
CWS_ID
Moodle Site Location URL
WordPress naam / Bedrijfsnaam

but im not sure what to do with this information.

also what does this all mean?
What is a:

• Pay.nl
  Pay.nl Username
  Pay.nl Password
  Pay.nl Company ID
  Pay.nl Program ID
  Pay.nl Website ID
  Pay.nl Website Location ID
  CWS_ID

  WordPress naam / Bedrijfsnaam

and how do i get a Moodle Site Key?

also is there a video online about this?

thank you for any help you can provide.

René

https://www.ads-software.com/extend/plugins/cursuswebshop/