Reply to VCI 400 into a DJM 900 Nexus....upcoming gig...

Hey guys, quick question and sorry if this is basic...but...

I've an upcoming gig and I'm using my VCI 400 out for the first time in a club. They have a DJM 900 Nexus installed and looks like I'm going to have to go from my VCI 400 into this.

Which is the best way? My outputs are 1/4 jack and XLR. I know it's better to just go straight into the clubs system, but not easy to do between other DJ's preforming.

Thanks in advance