If an aux device is being used further away from the sound desk, a DI box should be used, to ensure audio quality is maintained over the longer distance.
You will need:
A stereo mini jack to mono jack pair cable. Normally located under the sound desk
A Stereo DI Box - normally located in the top drawer of the filing cabinet in the tech cupboard
A minimum of 2 XLR cables - normally on the hangers in the tech cupboard
Stereo mini jack to mono jack pair cable
Stereo DI box
XLR cable