Access cloud for customer Odata Service from HCP

Hi 

I have a UI(sapui5) which consumes ODATA Service from "cloud for customer" system.

I am using connectivity proxy servlet(using destinations) to avoid cross origin issue.  when i deploy and access this UI from cloud, the response of the odata service is " HTTP status 500 javax.net.ssl.SSLPeerUnverifiedException: peer not authenticated".

I tried giving the http url and that says "502 bad gateway".

How to resolve SSL issue for cloud.?

Is there any other configuration that needs to be done to consume ODATA from "Cloud for customer" system

Regards

Priyal