Panasonic MSCSAHT05 SYSTEM CABLE

hello I have a Panasonic sbw a310 subwoofer system that the DVD player went bad on it and I threw it away and I wanted to use this as a powered amplifier for work I have an XM radio that I wanted to hook up to it the first thing was how do I turn it on and the way they use it they do it is they had a 25-pin connector between the subwoofer and the DVD player and the way they turn it on they apply 12 volt DC between pin number 19 which would be this one in ground any of the ground all the grounds are common the ones for the speakers the chassis and all the ones on the pinup so that's how they do it but that's then I need to get an external 12 volt power supply the other way I found out to do it is to get the amplifier just be careful it's 110 volts in there and I jumped the output of the fuse to the brown wire that goes to the main transformer and that turns on the amplifier then I can ap