DJM 900NXS2 no microphone in Dj booth an headphones wanted

Hello

soon i am hosting a party and the headliner does not want to hear my mcing trough the monitors and his headphones. how do we manage that if everything goes trough the djm 900nxs2 mixer?? i have hear there is a club menu but couldnt find anything relevant until now.

thanks for the help, gabriel