Most of the time they were expected to make contact with their parent race on their own, with the types that ended up on my planet.

It's probably not gonna help, but if you were seeded without communal intentions, they either want you to be the start of somethin' new and you're as much human as you are whatever they are. If you're supposed to figure out what you are, instinct will kick in whenever you're at the right age and you'll just know how to contact them or they'll have something set up for you.