Question HTTP/HTTPS Outbound Dedicated IP

[MorrisC]

I was testing the outbound ip of website with dedicated ip, it appears that it is using Plesk Linux default IP to do all outbound call. Anyway to use the website domain ip to use its own dedicated ip instead of routing to the default ip?

Any tips on configuring source based ip routing when adding a new ip? Instead of using default ip routing....thanks

Thank you

OS: Cloudlinux with Nginx handling static files
NAT: not used. Direct public ip assignment