URL Redirects for two different websites

Hi,

I have a client who has two different websites. I have recreated the website pages within one of the client's websites.

seewithfresheyes.co.uk content has been recreated on look-again.org

So, am I right in thinking that the URL Redirects have to show the full URL as follows:

https://www.seewithfresheyes.co.uk/headway -> /headway-gloucestershire 301

Squarespace's page on URL Mappings only refers to an old site and a new site using /headway -> /headway-gloucestershire 301

But it's not an old site with the same domain name. It is a different website domain to another website domain with the content pages added withing the Look Again website.

Thanks in advance

Jason