cloudfront, simple question

Hello,
I have recently installed wpfc on two sites with amazon cloudfront cdn properly connected.

I already see the statistics on amazon cloudfront side which is a good sign.

Should I see cloudfront url in the site source code? Because I have tried cloudfront on other implementations and I always saw the cloudfront url before each link.

Should I worry or is this ok?

Thanks in advance for your help!

https://www.ads-software.com/plugins/wp-fastest-cache/