求懂英文的哥们帮个忙，t-rex绿电源配线的问题

折腾大亨

1x Black link cable with five 2,1mm – 2,1mm connectors
       1x Red 50cm DC cable with 2,1mm – 2,5mm connectors for use on the 12V AC outlet port
       1x Blue 50cm AC cable with 2,5mm – 2,5mm connectors for use on the 12V AC outlet port
       1x Black 50cm DC cable with 2,1mmDC – 3,5mm mini-jack connectors
       2x 20cm DC cables with 2,1mm -2,1mm connectors
       4x 50cm DC cables with 2,1mm -2,1mm connectors
       1x 75cm DC cables with 2,1mm -2,1mm connectors
       1x 100cm DC cables with 2,1mm -2,1mm connectors


红线和蓝线是什么意思？他的配线有没有正负极调反对那种线？