In https://access.redhat.com/documentation/en-us/red_hat_3scale_api_management/2.5/html/getting_started/quickstart#securing_controlling_and_promoting_your_apis
all the links point to 404 pages:

• guide on the available options
• choice of several deployment options for the API traffic manager layer
• guide for apicast
• Openshift
• analytics guide
• developer portal guide
• {{Configure ActiveDocs }}
• Configure your signup workflows
• email template content
• integration with OpenID Connect
• Liquid markup
• (SaaS documentation)
• (SaaS documentation)