Rowe MMCD-1 - how do I get a preamp out and disable everything else?

Hello. I have a question I hope someone can help me with. I am a musician/audio engineer whose knowledge does not extend to building or repairing gear. My ability to make sense of schematics is rudimentary. ("Take it to the shop!") I sometimes install sound systems in bars and restaurants but prior to my last job I had never had to integrate a jukebox into a system. I want to disable the power amps and speakers in the jukebox and run an unbalanced line out that I can put through a DI and go from there, through a small Mackie board and SP260 speaker processor into powered QSC K8's. The last job had a newer jukebox with RCA line out jacks inside, no problem. The new job has a mmcd-1 which doesn't appear to be as accommodating. Can it be done? Thanks for your help!