Install citrine.
It will give you the link to the local relay it is running. 
Put the link in your relays.

I added it to my private, search, and local relays in amethyst. That part may be wrong.
 

 I got the insatll fine just haven't taken the time to understand the various relay types to configure.  

 I don't really understand the relay types either. I posted asking about it once but got crickets. 

 https://primal.net/e/note1llfchaw8cusp4la2gm2xzf3uekrdqlfsyf4u088xzt9wvsvdslrsz34kk4 

 might be the info you're looking for