Well, we have a third hint - I'm not sure if it has already been discussed and unfortunately I'm away and not beeing able to play the game. CoR has a borderline to patrol. If you are waiting for an enemy, you normally draw the border in a 90° angle to the direction where the enemy is coming from. Did anybody draw a line from the border to the rift and looked, if that line crossed the RR line and where?
Wouldn't this have to be an entire plane, since space isn't all that 2 dimensional? The only thing we have that is 2 dimensional is the RR line, which isn't even for certain part of the game. (Obviously it exists, but does it mean anything in the game?)