It's a much more private connection! Likely a relationship where you only feel like you can safely connect when it's just the two of you.This is not a forever thing, composite charts progress too! But it just means you'll likely spend a lot of time in the 'getting to know each other' stage (although the feeling of knowing is likely there already, and deep!).
The big key for 12h composites; patience. It will happen on it's own time, when each of your slumbering selves feel safe. Be gentle with these connections, but also be mindful not to get too lost in each other; that'll lead to burn out.
-R