Ableton Live outputs to Rekordbox

Hi,

I would like to output Ableton Live into a deck input in Rekordbox.

I tried routing the output of Ableton into the Rekorbox but only the channel 1/2 works and it's not going thru a deck, only thru some master that I am unable to control in Rekorbox.

I then tried to use soundflower to make the connection between the two software but that wasn't working either...

Is there a way I can do this?

I just want to mix my live production on Ableton with my tracks on Rekorbox using my controller.