DDJ-FLX10 -> USB -> 4x1 Stereo Ch. -> Live 11.3.4 Configuration

My DDJ-FLX10 connects via USB to my Mac Studio. Ableton Live v11.3.4 is installed on the computer. In Live's Audio Settings, both Audio Input Device and Output Device are set to 'DDJ-FLX10 (10in., 4 Out)'. Under Input Config, Stereo Inputs 1/2, 3/4, 5/6, 7/8 and 9/10 are all selected with Deck 1, Deck 2, Deck 3, Deck 4 and Master respectively configured next to each pair. I have five Audio Tracks setup in Live each receiving audio from Ext. In with the specific input  for each channel set to a different deck, i.e 1/2 Deck 1, 3/4 Deck 2, etc.. However, there doesn't seem to be a way on the DDJ-FLX10 GUI to tell it to route its channel outputs to those inputs, and as a result, only the Master output registers in Live. I have ensured Live has full disk access, as well. I figure I must have missed something somewhere, so could someone please tell me what that is?

Thanks in advance.

-Bryan