KRC4 Compact Internal i/o breakout box

Been running our cart mounted KR6 R900 on an external Beckhoff setup since new. I now need to move the external setup over to our new KR120 to control a tool changer, spindle and plasma cutter. Want to start using the KRC4 compact's internal Beckhoff to run the spindle contactor and external valves on the cart's din rail. I've already mapped the signals in WorkVisual and i"d like to run an i/o breakout box from the DB50 plug to the left of the X55. Trying not to pull the entire controller out of it's rack mount to trace wiring. Would anyone happen to have a pinout diagram for that plug? It would be much appreciated.

Thank you very much,

it was under X12 in the optional interfaces manual