How to midi keyboard to Digi 002 if its midi'd to my MPC

How to midi keyboard (Triton) to Digi 002 if its midi'd to my MPC. Is this where the thru function comes in handy cause I never have used it. I ouldlike to use the Reason program but am tired of unplugging my midi cords all the time.

I have the Digi 001, but the way that it's set is that the MPC controls the Triton and my DIGI 001 controls my MPC. I only use the MIDI cables from the DIGI 001 to control the MPC during multi-track recording. Hopefully this will help a little.

D-Block