Sorry if my initial comment is not clear enough. My concern is that the quoted relation only has a "via" node with no "to" and "from", so it's incomprehensible.

I suppose you mean that the RCP can be accessed by turning right from the entrance, and that's the only legally allowed turn from https://www.openstreetmap.org/way/1410120494 ? In that case, how about mapping the "back door" with `access=private` way and `barrier=gate` node and map the way as the "to" of the turn restriction?