What is the Redirect Rule for corresponding https urls to new domain with the same https urls?

[WSIDW]

2 sites have the same urls but the owner wants just the 1 site. So I will be doing a 301 redirect with .htaccess from

https://www.example.co.uk/sportsbook/SOCCER/today/

redirecting to

https://www.example.com//sportsbook/SOCCER/today/

There are a lot of urls that are the same, so I was wondering what the rule is to put in the file please that will change them all to the corresponding urls?

Would this be correct?...

RewriteEngine on
RewriteCond %{HTTPS_HOST} ^example.co.uk [NC,OR]
RewriteCond %{HTTPS_HOST} ^www.example.co.uk [NC]
RewriteRule ^(.*)$ https://example.com$1 [L,R=301,NC]

Or would a simple rule like this work... redirect 301 / http://www.new domain.com/

If not correct could you please give me the correct rule, thanks!

Then of course doing a change of address of address in webmaster tools after.

Also... do I still need to do the forwarding from the https://www.example.co.uk/ domain provider after as well?

Many thanks for your help in advance.

[WSIDW]

Anyone? lol