Bose l1 model 2 manual with b2

bose l1 model 2 with b2 Bass bottom, United States.

I purchased two of these systems to run stereo. My problem is feedback... My band can't get out far enough in front to have them work correctly. I purchased 4 powered monitors and moved the tubes out in front of us. My problem is I don't understand how to connect these. I have a T8S Tone Match Mixer. I sure could use some help.. Diagrams and instructions. Thanks