Why are there 2 XLR under Master 1 ?

Hey,

I use my DDJ SZ2 at home with a single booth connection to a KAM powered 1000W speaker.

I am playing out for a friends party, do I therefore need 2 XLR cables under the Master 1 (venue has XLR ports and their built in speakers).

Will also use my speaker as the Monitor...

Thanks, Richard