The matrix in this room can be used to display content on all four screens from any source via manually entering your selections. If you open the cabinet under the touch panel you’ll notice two rows of selections, the top represents inputs and the bottom represents outputs.
The order of inputs is as follows:
1 = PC
2 = HDMI
3 = USB-C
And the order of outputs is as follows, moving around the room from the perspective of the doors: