How can i point the url www.test.com on port 123 for ssl to a sub site under the default website?

I have a default website under iis10. Under the default webaite i have 2 sites running. - site1 - site2 My ssl certificate is added to the bindings at port 123 . The ur is by example www.test.com I want to reach site1 with www.test.com:123 And site two with port 80. I dont want that site 1 gets the url www.test.com:123/site1 I want to reach it by the short Url.

How can I make this work?

Url rewrite?

I tried to make url rewrite but never had experience with it before.