Create the required certificate package to allow TLS 1.2

Hi Guys, 

Im currently trying to create a certificate to allow TLS1.2 to our SQL database. 

These are the instructions Im following :

https://community.sophos.com/kb/en-us/131698

at the end of the article it says "You have to import the certificate created on the SQL Server computer" but where do i need to store the certificate? i  have put it into the local machine

- trusted Root Certification authority

and also

- personal 

but its still not picking it up in the checkDBconnection.exe tool. I was wondering if anyone knows specifically where this Certificate needs to be imported into. 

Thank you