You will need to modify the SSL client profile settings in the reverse proxy scenario only. This is because the reverse proxy uses the SSL client, instead of the SSL device profile, when connecting to the upstream Origin Content Server using HTTPS.
The SSL Proxy, also known as the SSL Forward Proxy, uses parameters taken from the SSL connection made by the client when originating SSL connections to the server. As a result, settings in the default SSL client profile are
not applied to these connections. To modify any parameters for SSL connections, change the corresponding SSL device-profile.