Mackie DFX12 AUX jack - splitter? Help!

Mackie DFX12 AUX jack - splitter? Help!

Sorry for the cluster title - didn’t know what to type.

Started working at this pub and they use a Mackie DFX12 mixer. I’m obsessed with knowing about it to the point of finding an online manual for it as I’ve never used a mixer before (it’s simple but I want to maximize its effects as much as I can). So I use a laptop with a Pioneer DDJ-SB which uses red+white wires (audio) to plug in the back and the other part of the wire is an AUX wire. Problem is I only connect in one jack of the Mackie mixer, meaning some speakers in the pub don’t work. Also can’t play Beatles as they’re…recorded differently? Some mono stuff that I don’t quite understand, to be honest. So I’m wondering what wire I’d need that could connect to my Pioneer controller (red+white audio) yet have two wires that plugs in the mixer. I honestly have no clue where to go from here so any help would be appreciated, seriously.

Hi mate. Dont forget that Mackie is not a DJ Mixer, its a mixing console, they are designed as the last stage before going to the PA system. In your case (looking at the outputs/inputs you have access to) i would run your master out into the CD In on the Mackie. You want to keep everything on the Console as flat as possible, and keep the FX use at your end.
To set up, crank everything at the dj end as you would normally, and make the adjustments on the console when you do a sound check.