DDJ-SR w/ Behringer UMC404hd cue audio issue

I have my DDJ-SR setup with a Behringer UMC404hd external audio interface. Using rekordbox v6 as my software. 

Connections are as follows:

1) DDJ-SR connected to the UMC404hd via the booth master out 1/4in TRS to inputs 1 and 2 on the UMC404hd. 

2) DDJ-SR to laptop via USB

3) Behringer UMC404hd to laptop via USB

4) Behringer UMC404hd to speakers via RCA 

Master out audio playing through the speakers sounds godly after adding the UMC404hd but unfortunately when setup the way I have it, I loose any ability to hear the cue audio through my headphones. 

While it was nice to be forced to practice mixing without headphones this is not ideal for me long term. Is there an easy fix to this? Am I using the wrong cables, inputs, etc? I'm hoping I just have rekordbox configured incorrectly.