Say I connect Sanctuary Hills to Oberland Park. I then Connect Oberland to The Castle. I know SH and OP will share supplies, but will The Castle be connected by to SH by proxy?

Anyone know the answer?

I was wondering this too. I funnelled all of the smaller settlements to Red Rocket planning on building it as my main tall base, but now kind of want to do that somewhere else...since everything is going to Red Rocket, if I link just red rocket to a new place will it get ALL the places I have linked to RR?