How does routing work with 2 MRCCs?

[seychmar]

I’m thinking of buying a second MRCC as an expansion. Unless I am misunderstanding something, how could I possibly press and hold the Y button on MRCC 1 while simultaneously selecting the MIDI out port on MRCC 2 on the other side of the studio? There must be an easier way to do this. Would it be possible to implement a latch function on the Y button by double clicking for example?