OIA to OIC integration using rest end point url

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We have set up a connection in OIA HUB for OIC rest point URL(used Webservice Generic provider type) , along with it we created one more connection with OIC host URL (user Oracle integration type).

Both connections are online , from OIA we tried mapping to load and save oracle integration, we don't see connection setting up.

Please could anyone help us out to understand what is the issue and how we can address the same?